The Week: A Roundup of This Week’s Science News

“Science,” a colleague once said at a meeting, “is a mighty enterprise, which is really rather quite topical.” He was so right: as we continue to enhance our coverage of the scientific world, we always aim to keep the latest news front and center.

His observation seemed like a nice way to introduce this column, which will highlight the week’s developments in health and science news and glance at what’s ahead. This past week, for instance, the mighty enterprise of science addressed itself to such newsy topics as the flu (there’s still time to get vaccinated!), and mental illness and gun control.

In addition to the big-headline stories that invite wisdom from scientists, each week there is a drumbeat of purely scientific and medical news that emerges from academic journals, fieldwork and elsewhere. These developments, from the quirky to the abstruse, often make their way into the daily news cycle, depending on the strength of the research behind them. (Well, that’s how we judge them, anyway.)

Many discoveries are hard to unravel. “In a way, science is antithetical to everything that has to do with a newspaper,” the same colleague observed. “You couldn’t imagine anything less consumer-friendly.”

Let’s aim to fix that. Below, a selection of the week’s stories.

DEVELOPMENTS

Health

Strange, but Effective

People with a bacterial infection called Clostridium difficile — which kills 14,000 Americans a year — have a startling cure: a transplant of someone else’s feces into their digestive system, which introduces good bacteria that the gut needs to fight off the bad. For some people, antibiotics don’t fix this problem, but an infusion of diluted stool from a healthy person seems to do the trick.

Genetics

Dig We Must

Hillery Metz and Hopi Hoekstra/Harvard University

Evolutionary biologists at Harvard took a tiny species of deer mice, known for building elaborate burrows with long tunnels, and bred it with another species of deer mice, which builds short-tunneled burrows. Comparing the DNA of the original mice with their offspring, the biologists pinpointed four regions of genetic code that help tell the mice what kind of burrow to construct.

Aerospace

Launch, Then Inflate

Uncredited/Bigelow Aerospace, via Associated Press

NASA signed a contract for an inflatable space habitat — roughly pineapple-shaped, with walls of floppy cloth — that will ideally be appended to the International Space Station in 2015. NASA aims to use the pod to test inflatable technology in space, but the company that builds these things, Bigelow Aerospace, has bigger ambitions: think of a 12-person apartment and laboratory in the sky, with two months’ rent at north of $26 million.

Biology

What’s Green and Flies?

Jodi Rowley/Australian Museum

National Geographic reported on an Australian researcher working in Vietnam who discovered a great-looking new species of flying frog. Described as having flappy forearms (the better for gliding), the three-and-a-half-inch-long frog likes to “parachute” from tree to tree, Jodi Rowley, an amphibian biologist at the Australian Museum in Sydney, told the magazine. She named it Helen’s Flying Frog, for her mother.

Privacy

That’s Joe’s DNA!

People who volunteer their genetic information for the betterment of science — and are assured anonymity — may find that their privacy is not a slam dunk. A researcher who set out to crack the identities of a few men whose genomes appeared in a public database was able to do so using genealogical Web sites (where people upload parts of their genomes to try to find relatives) as well as some simple search tools. He was trying to test the database’s security, but even he did not expect it to be so easy.

Genetics

An On/Off Switch for Disease

Geneticists have long puzzled over what it is that activates a disease in one person but not in another — even in identical twins. Now researchers from Johns Hopkins and the Karolinska Institute in Sweden who studied people with rheumatoid arthritis have identified a pattern of chemical tags that tell genes whether to turn on or not. In rheumatoid arthritis, the immune system attacks the body, and it is thought the tags enable the attack.

Planetary Science

That Red Planet

Everybody loves Mars, and we’re all secretly hoping that NASA’s plucky little rover finds evidence of life there. Meanwhile, a separate NASA craft — the Mars Reconnaissance Orbiter, which has been looping the planet since 2006 — took some pictures of a huge crater that looks as if it once held a lake fed by groundwater. It is too soon to say if the lake held living things, but NASA’s news release did include the happy phrase “clues to subsurface habitability.”

COMING UP

Animal Testing

Retiring Chimps

Emily Wabitsch/European Pressphoto Agency

A lot of people have strong feelings about the use of chimpanzees in biomedical and behavioral experiments, and the National Institutes of Health has been listening. On Tuesday, the agency is to release its recommendations for curtailing chimp research in a big way. This will be but a single step in a long process and it will apply only to the chimps the agency owns, but it may well stir big reactions from many constituencies.

Read More..

The Week: A Roundup of This Week’s Science News

“Science,” a colleague once said at a meeting, “is a mighty enterprise, which is really rather quite topical.” He was so right: as we continue to enhance our coverage of the scientific world, we always aim to keep the latest news front and center.

His observation seemed like a nice way to introduce this column, which will highlight the week’s developments in health and science news and glance at what’s ahead. This past week, for instance, the mighty enterprise of science addressed itself to such newsy topics as the flu (there’s still time to get vaccinated!), and mental illness and gun control.

In addition to the big-headline stories that invite wisdom from scientists, each week there is a drumbeat of purely scientific and medical news that emerges from academic journals, fieldwork and elsewhere. These developments, from the quirky to the abstruse, often make their way into the daily news cycle, depending on the strength of the research behind them. (Well, that’s how we judge them, anyway.)

Many discoveries are hard to unravel. “In a way, science is antithetical to everything that has to do with a newspaper,” the same colleague observed. “You couldn’t imagine anything less consumer-friendly.”

Let’s aim to fix that. Below, a selection of the week’s stories.

DEVELOPMENTS

Health

Strange, but Effective

People with a bacterial infection called Clostridium difficile — which kills 14,000 Americans a year — have a startling cure: a transplant of someone else’s feces into their digestive system, which introduces good bacteria that the gut needs to fight off the bad. For some people, antibiotics don’t fix this problem, but an infusion of diluted stool from a healthy person seems to do the trick.

Genetics

Dig We Must

Hillery Metz and Hopi Hoekstra/Harvard University

Evolutionary biologists at Harvard took a tiny species of deer mice, known for building elaborate burrows with long tunnels, and bred it with another species of deer mice, which builds short-tunneled burrows. Comparing the DNA of the original mice with their offspring, the biologists pinpointed four regions of genetic code that help tell the mice what kind of burrow to construct.

Aerospace

Launch, Then Inflate

Uncredited/Bigelow Aerospace, via Associated Press

NASA signed a contract for an inflatable space habitat — roughly pineapple-shaped, with walls of floppy cloth — that will ideally be appended to the International Space Station in 2015. NASA aims to use the pod to test inflatable technology in space, but the company that builds these things, Bigelow Aerospace, has bigger ambitions: think of a 12-person apartment and laboratory in the sky, with two months’ rent at north of $26 million.

Biology

What’s Green and Flies?

Jodi Rowley/Australian Museum

National Geographic reported on an Australian researcher working in Vietnam who discovered a great-looking new species of flying frog. Described as having flappy forearms (the better for gliding), the three-and-a-half-inch-long frog likes to “parachute” from tree to tree, Jodi Rowley, an amphibian biologist at the Australian Museum in Sydney, told the magazine. She named it Helen’s Flying Frog, for her mother.

Privacy

That’s Joe’s DNA!

People who volunteer their genetic information for the betterment of science — and are assured anonymity — may find that their privacy is not a slam dunk. A researcher who set out to crack the identities of a few men whose genomes appeared in a public database was able to do so using genealogical Web sites (where people upload parts of their genomes to try to find relatives) as well as some simple search tools. He was trying to test the database’s security, but even he did not expect it to be so easy.

Genetics

An On/Off Switch for Disease

Geneticists have long puzzled over what it is that activates a disease in one person but not in another — even in identical twins. Now researchers from Johns Hopkins and the Karolinska Institute in Sweden who studied people with rheumatoid arthritis have identified a pattern of chemical tags that tell genes whether to turn on or not. In rheumatoid arthritis, the immune system attacks the body, and it is thought the tags enable the attack.

Planetary Science

That Red Planet

Everybody loves Mars, and we’re all secretly hoping that NASA’s plucky little rover finds evidence of life there. Meanwhile, a separate NASA craft — the Mars Reconnaissance Orbiter, which has been looping the planet since 2006 — took some pictures of a huge crater that looks as if it once held a lake fed by groundwater. It is too soon to say if the lake held living things, but NASA’s news release did include the happy phrase “clues to subsurface habitability.”

COMING UP

Animal Testing

Retiring Chimps

Emily Wabitsch/European Pressphoto Agency

A lot of people have strong feelings about the use of chimpanzees in biomedical and behavioral experiments, and the National Institutes of Health has been listening. On Tuesday, the agency is to release its recommendations for curtailing chimp research in a big way. This will be but a single step in a long process and it will apply only to the chimps the agency owns, but it may well stir big reactions from many constituencies.

Read More..

Cornell NYC Tech Will Foster Commerce Amid Education

Their curriculum devotes months to helping a company solve a current technological challenge. Their progress is supervised not just by an academic adviser, but also by an industry adviser. Their vast campus on Roosevelt Island, when it is built, will intersperse classrooms with office buildings, where high-tech companies can rent a suite and set up shop.

And when they showed up Monday for the very first day of classes at Cornell NYC Tech, the most ambitious institution of higher education to open in New York City in decades, students arrived not at some temporary structure on the edge of a construction site but to 20,000 square feet of donated space in the middle of Google’s $2 billion New York headquarters.

Cornell NYC Tech, a new graduate school focusing on applied science, is a bold experiment on many fronts: a major expansion for an august upstate school, a high-impact real estate venture for Roosevelt Island, an innovative collaboration with a foreign university, a new realm of influence for City Hall. But the most striking departure of all may be the relationship it sets forth between university and industry, one in which commerce and education are not just compatible, they are also all but indistinguishable. In this new framework, Cornell NYC Tech is not just a school, it is an “educational start-up,” students are “deliverables” and companies seeking access to those students or their professors can choose from a “suite of products” by which to get it.

Colleges and universities across the country — a great many of which are scrambling to find new ways to finance scientific research, as well as new ways to profit from the fruits of that research — are watching closely. In the last year, Mayor Michael R. Bloomberg has announced the creation of technology schools by both Columbia and New York University. And Cornell’s president, David J. Skorton, said he had been visited by representatives from other cities hopeful that the Cornell NYC Tech model might work there, too.

Of course, Cornell NYC Tech is not the first school to forge alliances with the local business community. The Massachusetts Institute of Technology plays a prominent role in that state’s technology scene, and Silicon Valley would not exist without Stanford, which has collected more than $1 billion in royalties as innovations linked to its campus made their way into the market.

But for Cornell NYC Tech, that close relationship is not merely the desired outcome; it is the founding premise. “The campus was set up specifically to increase the talent pool in New York City,” Dr. Skorton said, “to positively influence the New York City economy.”

New York City’s Economic Development Corporation, which helped select Cornell NYC Tech as the winner of a competition for $100 million in funds and $300 million worth of real estate from the city, predicts that the companies that will spin out from its campus will create tens of thousands of new jobs.

Calculations like that, impressive as they may be, have given some observers pause.

“The university has been at the forefront of big science since the 1940s and 1950s,” said Isaac Kramnick, a professor of government at Cornell’s main campus in Ithaca. “Now it’s entering an era in which it seems to be interested in for-profit science, and that does require some thinking as to what the fundamental purpose of a university is.” 

Daniel Huttenlocher, the dean of Cornell NYC Tech, is the first to admit that this new academic model is rife with potential conflicts of interest.

“I think there are lots of risks in trying to bring what are fundamentally different cultures and sets of goals together,” he said. “Companies need to make a profit. Universities have different motives — partly societal good, partly education — and that leads to different value systems.” For starters, he said, “if a student that a faculty member is advising is working at a company that the faculty member has a financial interest in, is the faculty member really keeping students’ interests in mind?”

Dr. Skorton, an expert in research ethics, mentioned several other areas of concern, including the work that students will do with outside companies. “If you don’t protect that interaction crisply and clearly,” he said, “you could be concerned about the student basically working in an unpaid capacity for industry.”

Read More..

As Jordan Elections Near, Protesters Focus on King

Bryan Denton for The New York Times

Local tribal leaders in southern Jordan waited for a campaign event to begin on Saturday. Parliamentary elections are being held on Wednesday.

AMMAN, Jordan — For two years, protests demanding reform here have seethed, fueled by complaints about corruption, incompetent governing and the slow pace of change. In November, deadly demonstrations against a cut in fuel subsidies spread throughout the country.

Bryan Denton for The New York Times

Young supporters of the Islamic Action Front who are boycotting elections follow their party’s demonstration online.

The widening anger has brought together longtime political opposition figures with those who were once a part of the monarchy’s loyal base. The focus of the protests has also started to broaden, from anger at corrupt officials to bolder expressions of dissatisfaction with King Abdullah II.

To quiet his critics, the king is relying on a new round of parliamentary elections scheduled for Wednesday, a contest that he has promised “will breathe life into our democracy.”

The vote comes as Jordan copes with a number of domestic challenges, including a crushing deficit and a flood of more than 200,000 Syrian refugees — the kinds of crises that have often derailed movements for reform.

However, while the opposition has often seemed more conservative in Jordan than elsewhere in the region — calling for reform rather than the overthrow of the government — it is has shown no sign of easing pressure on the king.

The disillusionment that has fueled the protests is concentrated in the southern city of Ma’an, known for uprisings and phosphate mines.

In the center of town this week, a group of men who had occupied a traffic circle to protest the region’s lack of jobs ate lunch in a tent. Some said they had worked as smugglers, but even that trade had dried up.

“We want to live,” proclaimed graffiti on a sculpture. Beyond it the charred remains of the governor’s residence was visible, set on fire during a recent protest.

The parliamentary campaign in Ma’an has focused on local issues — like winning the region its share of the spoils from the mines — and on the corruption that has become a rallying cry for dissent across the country.

“They don’t see anything from the precious mines,” said Abdul-Karim al-Bahri al-Muhameed, a former civil servant who is running with the support of his tribe. “The king is not serious about getting the money stolen by corruption,” he said.

He sat in the salon of a tribal leader, Sheik Adel al-Muhameed, a supporter of his candidacy who was boycotting the vote. “I don’t trust the Parliament,” he said.

During the last two years, the government had approached tribal leaders like him to try and stop the street protests, Mr. Muhameed said. “The government cannot handle it,” he said. The election, he added, “is a play.”

Citing a history of rigged elections in Jordan that have produced toothless legislatures, many government critics have dismissed Wednesday’s polling as a cosmetic and desperate effort by an absolute monarch to avoid handing over power. A few opposition groups, including the largest, the Jordanian Muslim Brotherhood, and the protest network known as Hirak are boycotting the vote.

“He doesn’t carry out of any of his promises,” said Nimer al-Assaf, the deputy general secretary of the Islamic Action Front, the Brotherhood’s political party. Mr. Assaf predicted that no more than 25 percent of registered voters would turn up at the polls. “People are rejecting the whole idea,” he said.

But other opposition groups are participating in the election, stirring new divides.

Other candidates, to be sure, have put aside their misgivings in the hope that freedom will gradually emerge.

“Democracy happens in degrees,” said Mohamed al-Hajouj, a Palestinian refugee who is running for Parliament, undeterred by gerrymandered districts that continue to underrepresent the country’s citizens of Palestinian origin, a majority.

Something had to be done, Mr. Hajouj reckoned, likening Jordan to a grenade ready to explode. The elections, he said, would keep it from blowing up.

Jordanian officials say they have added a number of election safeguards to prevent what was seen as a process manipulated by the country’s powerful intelligence services and marred by vote-buying and other fraud.

Read More..

Media Decoder: News Outlets Take to Washington for Inauguration Coverage

If he squints hard enough, President Obama will be able to see CNN from his perch on the inaugural podium on Monday.

The cable news channel has set up an elaborate studio on the National Mall — one of the four locations where its anchors will be leading coverage of Mr. Obama’s second inaugural celebration.

“The goal is to put our anchors in the middle of all the activity,” said Sam Feist, CNN’s Washington bureau chief. So in the morning, Wolf Blitzer will start out by the Capitol building and Anderson Cooper by the Mall, moving to new spots along the parade route in the afternoon. Other anchors will be at the inaugural balls at night.

The coverage might seem more subdued on other major television networks, reflecting the fact that there is generally less enthusiasm for presidential inaugurations the second time around. Still, the ceremony and the spectacle that accompanies it will take over the networks and news channels beginning with their morning shows, some of which are relocating to Washington for the day.

CBS has built a studio on the Mall beside CNN’s. Its one-year-old morning show, “CBS This Morning,” will be broadcast from there and expand to three hours for the day. NBC’s “Today” show will have all of its hosts in Washington, as well.

ABC’s “Good Morning America” is doing it a bit differently, sending George Stephanopoulos and Josh Elliott to Washington and having the show’s other hosts stay in New York.

The bulk of the festivities will be anchored by the same correspondents who handled election night for their networks. There has been a last-minute change at PBS, though: Judy Woodruff is away from Washington because of a family illness, a spokeswoman said, so the senior correspondent Jeffrey Brown will anchor with Gwen Ifill, instead.

Most Americans will watch the inauguration on television, just as they did in 2009, the first time Mr. Obama was inaugurated. But there will also be a panoply of Web sites live-streaming the event, including that of the Presidential Inauguration Committee.

Read More..

Well: Holly the Cat's Incredible Journey

Nobody knows how it happened: an indoor housecat who got lost on a family excursion managing, after two months and about 200 miles, to return to her hometown.

Even scientists are baffled by how Holly, a 4-year-old tortoiseshell who in early November became separated from Jacob and Bonnie Richter at an R.V. rally in Daytona Beach, Fla., appeared on New Year’s Eve — staggering, weak and emaciated — in a backyard about a mile from the Richters’ house in West Palm Beach.

“Are you sure it’s the same cat?” wondered John Bradshaw, director of the University of Bristol’s Anthrozoology Institute. In other cases, he has suspected, “the cats are just strays, and the people have got kind of a mental justification for expecting it to be the same cat.”

But Holly not only had distinctive black-and-brown harlequin patterns on her fur, but also an implanted microchip to identify her.

“I really believe these stories, but they’re just hard to explain,” said Marc Bekoff, a behavioral ecologist at the University of Colorado. “Maybe being street-smart, maybe reading animal cues, maybe being able to read cars, maybe being a good hunter. I have no data for this.”

There is, in fact, little scientific dogma on cat navigation. Migratory animals like birds, turtles and insects have been studied more closely, and use magnetic fields, olfactory cues, or orientation by the sun.

Scientists say it is more common, although still rare, to hear of dogs returning home, perhaps suggesting, Dr. Bradshaw said, that they have inherited wolves’ ability to navigate using magnetic clues. But it’s also possible that dogs get taken on more family trips, and that lost dogs are more easily noticed or helped by people along the way.

Cats navigate well around familiar landscapes, memorizing locations by sight and smell, and easily figuring out shortcuts, Dr. Bradshaw said.

Strange, faraway locations would seem problematic, although he and Patrick Bateson, a behavioral biologist at Cambridge University, say that cats can sense smells across long distances. “Let’s say they associate the smell of pine with wind coming from the north, so they move in a southerly direction,” Dr. Bateson said.

Peter Borchelt, a New York animal behaviorist, wondered if Holly followed the Florida coast by sight or sound, tracking Interstate 95 and deciding to “keep that to the right and keep the ocean to the left.”

But, he said, “nobody’s going to do an experiment and take a bunch of cats in different directions and see which ones get home.”

The closest, said Roger Tabor, a British cat biologist, may have been a 1954 study in Germany which cats placed in a covered circular maze with exits every 15 degrees most often exited in the direction of their homes, but more reliably if their homes were less than five kilometers away.

New research by the National Geographic and University of Georgia’s Kitty Cams Project, using video footage from 55 pet cats wearing video cameras on their collars, suggests cat behavior is exceedingly complex.

For example, the Kitty Cams study found that four of the cats were two-timing their owners, visiting other homes for food and affection. Not every cat, it seems, shares Holly’s loyalty.

KittyCams also showed most of the cats engaging in risky behavior, including crossing roads and “eating and drinking substances away from home,” risks Holly undoubtedly experienced and seems lucky to have survived.

But there have been other cats who made unexpected comebacks.

“It’s actually happened to me,” said Jackson Galaxy, a cat behaviorist who hosts “My Cat From Hell” on Animal Planet. While living in Boulder, Colo., he moved across town, whereupon his indoor cat, Rabbi, fled and appeared 10 days later at the previous house, “walking five miles through an area he had never been before,” Mr. Galaxy said.

Professor Tabor cited longer-distance reports he considered credible: Murka, a tortoiseshell in Russia, traveling about 325 miles home to Moscow from her owner’s mother’s house in Voronezh in 1989; Ninja, who returned to Farmington, Utah, in 1997, a year after her family moved from there to Mill Creek, Wash.; and Howie, an indoor Persian cat in Australia who in 1978 ran away from relatives his vacationing family left him with and eventually traveled 1,000 miles to his family’s home.

Professor Tabor also said a Siamese in the English village of Black Notley repeatedly hopped a train, disembarked at White Notley, and walked several miles back to Black Notley.

Still, explaining such journeys is not black and white.

In the Florida case, one glimpse through the factual fog comes on the little cat’s feet. While Dr. Bradshaw speculated Holly might have gotten a lift, perhaps sneaking under the hood of a truck heading down I-95, her paws suggest she was not driven all the way, nor did Holly go lightly.

“Her pads on her feet were bleeding,” Ms. Richter said. “Her claws are worn weird. The front ones are really sharp, the back ones worn down to nothing.”

Scientists say that is consistent with a long walk, since back feet provide propulsion, while front claws engage in activities like tearing. The Richters also said Holly had gone from 13.5 to 7 pounds.

Holly hardly seemed an adventurous wanderer, though her background might have given her a genetic advantage. Her mother was a feral cat roaming the Richters’ mobile home park, and Holly was born inside somebody’s air-conditioner, Ms. Richter said. When, at about six weeks old, Holly padded into their carport and jumped into the lap of Mr. Richter’s mother, there were “scars on her belly from when the air conditioner was turned on,” Ms. Richter said.

Scientists say that such early experience was too brief to explain how Holly might have been comfortable in the wild — after all, she spent most of her life as an indoor cat, except for occasionally running outside to chase lizards. But it might imply innate personality traits like nimbleness or toughness.

“You’ve got these real variations in temperament,” Dr. Bekoff said. “Fish can by shy or bold; there seem to be shy and bold spiders. This cat, it could be she has the personality of a survivor.”

He said being an indoor cat would not extinguish survivalist behaviors, like hunting mice or being aware of the sun’s orientation.

The Richters — Bonnie, 63, a retired nurse, and Jacob, 70, a retired airline mechanics’ supervisor and accomplished bowler — began traveling with Holly only last year, and she easily tolerated a hotel, a cabin or the R.V.

But during the Good Sam R.V. Rally in Daytona, when they were camping near the speedway with 3,000 other motor homes, Holly bolted when Ms. Richter’s mother opened the door one night. Fireworks the next day may have further spooked her, and, after searching for days, alerting animal agencies and posting fliers, the Richters returned home catless.

Two weeks later, an animal rescue worker called the Richters to say a cat resembling Holly had been spotted eating behind the Daytona franchise of Hooters, where employees put out food for feral cats.

Then, on New Year’s Eve, Barb Mazzola, a 52-year-old university executive assistant, noticed a cat “barely standing” in her backyard in West Palm Beach, struggling even to meow. Over six days, Ms. Mazzola and her children cared for the cat, putting out food, including special milk for cats, and eventually the cat came inside.

They named her Cosette after the orphan in Les Misérables, and took her to a veterinarian, Dr. Sara Beg at Paws2Help. Dr. Beg said the cat was underweight and dehydrated, had “back claws and nail beds worn down, probably from all that walking on pavement,” but was “bright and alert” and had no parasites, heartworm or viruses. “She was hesitant and scared around people she didn’t know, so I don’t think she went up to people and got a lift,” Dr. Beg said. “I think she made the journey on her own.”

At Paws2Help, Ms. Mazzola said, “I almost didn’t want to ask, because I wanted to keep her, but I said, ‘Just check and make sure she doesn’t have a microchip.’” When told the cat did, “I just cried.”

The Richters cried, too upon seeing Holly, who instantly relaxed when placed on Mr. Richter’s shoulder. Re-entry is proceeding well, but the mystery persists.

“We haven’t the slightest idea how they do this,” Mr. Galaxy said. “Anybody who says they do is lying, and, if you find it, please God, tell me what it is.”

Read More..

Well: Holly the Cat's Incredible Journey

Nobody knows how it happened: an indoor housecat who got lost on a family excursion managing, after two months and about 200 miles, to return to her hometown.

Even scientists are baffled by how Holly, a 4-year-old tortoiseshell who in early November became separated from Jacob and Bonnie Richter at an R.V. rally in Daytona Beach, Fla., appeared on New Year’s Eve — staggering, weak and emaciated — in a backyard about a mile from the Richters’ house in West Palm Beach.

“Are you sure it’s the same cat?” wondered John Bradshaw, director of the University of Bristol’s Anthrozoology Institute. In other cases, he has suspected, “the cats are just strays, and the people have got kind of a mental justification for expecting it to be the same cat.”

But Holly not only had distinctive black-and-brown harlequin patterns on her fur, but also an implanted microchip to identify her.

“I really believe these stories, but they’re just hard to explain,” said Marc Bekoff, a behavioral ecologist at the University of Colorado. “Maybe being street-smart, maybe reading animal cues, maybe being able to read cars, maybe being a good hunter. I have no data for this.”

There is, in fact, little scientific dogma on cat navigation. Migratory animals like birds, turtles and insects have been studied more closely, and use magnetic fields, olfactory cues, or orientation by the sun.

Scientists say it is more common, although still rare, to hear of dogs returning home, perhaps suggesting, Dr. Bradshaw said, that they have inherited wolves’ ability to navigate using magnetic clues. But it’s also possible that dogs get taken on more family trips, and that lost dogs are more easily noticed or helped by people along the way.

Cats navigate well around familiar landscapes, memorizing locations by sight and smell, and easily figuring out shortcuts, Dr. Bradshaw said.

Strange, faraway locations would seem problematic, although he and Patrick Bateson, a behavioral biologist at Cambridge University, say that cats can sense smells across long distances. “Let’s say they associate the smell of pine with wind coming from the north, so they move in a southerly direction,” Dr. Bateson said.

Peter Borchelt, a New York animal behaviorist, wondered if Holly followed the Florida coast by sight or sound, tracking Interstate 95 and deciding to “keep that to the right and keep the ocean to the left.”

But, he said, “nobody’s going to do an experiment and take a bunch of cats in different directions and see which ones get home.”

The closest, said Roger Tabor, a British cat biologist, may have been a 1954 study in Germany which cats placed in a covered circular maze with exits every 15 degrees most often exited in the direction of their homes, but more reliably if their homes were less than five kilometers away.

New research by the National Geographic and University of Georgia’s Kitty Cams Project, using video footage from 55 pet cats wearing video cameras on their collars, suggests cat behavior is exceedingly complex.

For example, the Kitty Cams study found that four of the cats were two-timing their owners, visiting other homes for food and affection. Not every cat, it seems, shares Holly’s loyalty.

KittyCams also showed most of the cats engaging in risky behavior, including crossing roads and “eating and drinking substances away from home,” risks Holly undoubtedly experienced and seems lucky to have survived.

But there have been other cats who made unexpected comebacks.

“It’s actually happened to me,” said Jackson Galaxy, a cat behaviorist who hosts “My Cat From Hell” on Animal Planet. While living in Boulder, Colo., he moved across town, whereupon his indoor cat, Rabbi, fled and appeared 10 days later at the previous house, “walking five miles through an area he had never been before,” Mr. Galaxy said.

Professor Tabor cited longer-distance reports he considered credible: Murka, a tortoiseshell in Russia, traveling about 325 miles home to Moscow from her owner’s mother’s house in Voronezh in 1989; Ninja, who returned to Farmington, Utah, in 1997, a year after her family moved from there to Mill Creek, Wash.; and Howie, an indoor Persian cat in Australia who in 1978 ran away from relatives his vacationing family left him with and eventually traveled 1,000 miles to his family’s home.

Professor Tabor also said a Siamese in the English village of Black Notley repeatedly hopped a train, disembarked at White Notley, and walked several miles back to Black Notley.

Still, explaining such journeys is not black and white.

In the Florida case, one glimpse through the factual fog comes on the little cat’s feet. While Dr. Bradshaw speculated Holly might have gotten a lift, perhaps sneaking under the hood of a truck heading down I-95, her paws suggest she was not driven all the way, nor did Holly go lightly.

“Her pads on her feet were bleeding,” Ms. Richter said. “Her claws are worn weird. The front ones are really sharp, the back ones worn down to nothing.”

Scientists say that is consistent with a long walk, since back feet provide propulsion, while front claws engage in activities like tearing. The Richters also said Holly had gone from 13.5 to 7 pounds.

Holly hardly seemed an adventurous wanderer, though her background might have given her a genetic advantage. Her mother was a feral cat roaming the Richters’ mobile home park, and Holly was born inside somebody’s air-conditioner, Ms. Richter said. When, at about six weeks old, Holly padded into their carport and jumped into the lap of Mr. Richter’s mother, there were “scars on her belly from when the air conditioner was turned on,” Ms. Richter said.

Scientists say that such early experience was too brief to explain how Holly might have been comfortable in the wild — after all, she spent most of her life as an indoor cat, except for occasionally running outside to chase lizards. But it might imply innate personality traits like nimbleness or toughness.

“You’ve got these real variations in temperament,” Dr. Bekoff said. “Fish can by shy or bold; there seem to be shy and bold spiders. This cat, it could be she has the personality of a survivor.”

He said being an indoor cat would not extinguish survivalist behaviors, like hunting mice or being aware of the sun’s orientation.

The Richters — Bonnie, 63, a retired nurse, and Jacob, 70, a retired airline mechanics’ supervisor and accomplished bowler — began traveling with Holly only last year, and she easily tolerated a hotel, a cabin or the R.V.

But during the Good Sam R.V. Rally in Daytona, when they were camping near the speedway with 3,000 other motor homes, Holly bolted when Ms. Richter’s mother opened the door one night. Fireworks the next day may have further spooked her, and, after searching for days, alerting animal agencies and posting fliers, the Richters returned home catless.

Two weeks later, an animal rescue worker called the Richters to say a cat resembling Holly had been spotted eating behind the Daytona franchise of Hooters, where employees put out food for feral cats.

Then, on New Year’s Eve, Barb Mazzola, a 52-year-old university executive assistant, noticed a cat “barely standing” in her backyard in West Palm Beach, struggling even to meow. Over six days, Ms. Mazzola and her children cared for the cat, putting out food, including special milk for cats, and eventually the cat came inside.

They named her Cosette after the orphan in Les Misérables, and took her to a veterinarian, Dr. Sara Beg at Paws2Help. Dr. Beg said the cat was underweight and dehydrated, had “back claws and nail beds worn down, probably from all that walking on pavement,” but was “bright and alert” and had no parasites, heartworm or viruses. “She was hesitant and scared around people she didn’t know, so I don’t think she went up to people and got a lift,” Dr. Beg said. “I think she made the journey on her own.”

At Paws2Help, Ms. Mazzola said, “I almost didn’t want to ask, because I wanted to keep her, but I said, ‘Just check and make sure she doesn’t have a microchip.’” When told the cat did, “I just cried.”

The Richters cried, too upon seeing Holly, who instantly relaxed when placed on Mr. Richter’s shoulder. Re-entry is proceeding well, but the mystery persists.

“We haven’t the slightest idea how they do this,” Mr. Galaxy said. “Anybody who says they do is lying, and, if you find it, please God, tell me what it is.”

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How M.I.T. Ensnared a Hacker, Bucking a Freewheeling Culture

Months earlier, the mysterious visitor had used the school’s computer network to begin copying millions of research articles belonging to Jstor, the nonprofit organization that sells subscription access to universities.

The visitor was clever — switching identifications to avoid being blocked by M.I.T.’s security system — but eventually the university believed it had shut down the intrusion, then spent weeks reassuring furious officials at Jstor that the downloading had been stopped.

However, on Jan. 3, 2011, according to internal M.I.T. documents obtained by The New York Times, the university was informed that the intruder was back — this time downloading documents very slowly, with a new method of access, so as not to alert the university’s security experts.

“The user was now not using any of the typical methods to access MITnet to avoid all usual methods of being disabled,” concluded Mike Halsall, a senior security analyst at M.I.T., referring to the university’s computer network.

What the university officials did not know at the time was that the intruder was Aaron Swartz, one of the shining lights of the technology world and a leading advocate for open access to information, with a fellowship down the road at Harvard.

Mr. Swartz’s actions presented M.I.T. with a crucial choice: the university could try to plug the weak spot in its network or it could try to catch the hacker, then unknown.

The decision — to treat the downloading as a continuing crime to be investigated rather than a security threat that had been stopped — led to a two-day cat-and-mouse game with Mr. Swartz and, ultimately, to charges of computer and wire fraud. Mr. Swartz, 26, who faced a potentially lengthy prison term and whose trial was to begin in April, was found dead of an apparent suicide in his Brooklyn apartment on Jan. 11.

Mr. Swartz’s supporters called M.I.T.’s decision a striking step for an institution that prides itself on operating an open computer network and open campus — the home of a freewheeling programming culture. M.I.T.’s defenders viewed the intrusion as a computer crime that needed to be taken seriously.

M.I.T. declined to confirm any of these details or comment on its actions during the investigation. The university’s president, L. Rafael Reif, said last week, “It pains me to think that M.I.T. played any role in a series of events that have ended in tragedy.” He appointed a professor, Hal Abelson, to analyze M.I.T.’s conduct in the investigation. To comment now, a spokeswoman for the university said, would be “to get ahead of that investigation.”

Early on Jan. 4, at 8:08 a.m., according to Mr. Halsall’s detailed internal timeline of the events, a security expert was able to locate that new method of access precisely — the wiring in a network closet in the basement of Building 16, a nondescript rectangular structure full of classrooms and labs that, like many buildings on campus, is kept unlocked.

In the closet, Mr. Halsall wrote, there was a netbook, or small portable computer, “hidden under a box,” connected to an external hard drive that was receiving the downloaded documents.

At 9:44 a.m. the M.I.T. police were called in; by 10:30 a.m., the Cambridge police were en route, and by 11 a.m., Michael Pickett, a Secret Service agent and expert on computer crime, was on the scene. On his recommendation, a surveillance camera was installed in the closet and a second laptop was connected to the network switch to track the traffic.

There may have been a reason for the university’s response. According to the timeline, the tech team detected brief activity from China on the netbook — something that occurs all the time but still represents potential trouble.

E-mails among M.I.T. officials that Tuesday in January 2011 highlight the pressures university officials felt over a problem they thought they had solved. Ann J. Wolpert, the director of libraries, wrote to Ellen Finnie Duranceau, the official who was receiving Jstor’s complaints: “Has there ever been a situation similar to this when we brought in campus police? The magnitude, systematic and careful nature of the abuses could be construed as approaching criminal action. Certainly, that’s how Jstor views it.”

Some of Mr. Swartz’s defenders argue that collecting and providing evidence to the government without a warrant may have violated federal and state wiretapping statutes.

John Schwartz contributed reporting.

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Iran Publicly Hangs 2 Men Convicted in Stabbing

Ebrahim Noroozi/Fars, via Associated Press

Iranians reacted in Tehran on Sunday at the execution of two men, whose stabbing of a man, caught on a video camera and posted online, caused an uproar.

TEHRAN — An eerie silence filled the air as a crowd of around 300 gathered Sunday just before sunrise in a Tehran park. They awaited the arrival of two young men who were about to die.

Amir Pourmand/Iranian Students News Agency, via Associated Press

Just before nooses were put on their necks, Alireza Mafiha, 23, laid his head on an executioner’s shoulder. Mohammad Ali Sarvari, 20, is at center.

The condemned stood shoulder to shoulder, motionless, in front of two police trucks with two nooses hanging from extendable cranes, about 15 feet high. Black-clad executioners were inspecting the remote controls they would use to hang the men, both in their early 20s, who were convicted of stabbing a man in November and stealing his bag and the equivalent of $20.

From behind a makeshift barrier of scaffolding, the crowd jostled for position. “Let’s move to the other side,” one spectator whispered to his wife, pointing to the spot where Iranian state television cameras had been set up. “I think we will have a better view from there.”

Although every year hundreds of convicts are hanged in Iran, a public hanging in a central park in Tehran is a rare event. Most hangings take place inside prisons, according to Iranian judicial officials and international human rights organizations.

Sunday’s execution in Park-e Honarmandan (Artists Park), near the crime scene, was part of a heavy-handed offensive by Iranian authorities, who say they are trying to prevent rising crime rates from getting out of hand by setting harsh examples. In recent weeks, public executions have been stepped up, and in several large cities the police have been rounding up what they call thugs and hooligans.

Police commanders and other officials blame government mismanagement of the economy — which they say has caused a rise in unemployment and inflation — for the increase in crime. International economic sanctions have aggravated problems, many here say, leading to a record gap between rich and poor in Iran.

While no official statistics are publicly available, officials report a rise in violent crimes, mostly perpetrated by young men attacking their victims with knives to get money and other valuables. Local news media report only a fraction of the episodes, but at social gatherings of middle-class Iranians — the usual targets — horrific stories of theft, kidnapping, rape and home burglaries abound.

“Two young men entered my house two weeks ago and beat me senseless,” said Manijeh, 54, a homemaker from north Tehran, a more affluent section of the city. The intruders bound her arms and legs and beat her, asking for the location of the safe, she said. “But we don’t have a safe,” said Manijeh, who declined to reveal her surname out of fear that the burglars would return. They stole her car, ransacked her home and took nearly everything inside, she said.

“Our city has become completely unsafe,” said Manijeh, speaking after her recent release from a hospital. “These things would never happen until some years ago. We need the harshest measures to stop these criminals.”

Armin, 30, an engineer, said his father was recently robbed and beaten by a gang of thieves on motorcycles. “They hit him hard, but afterwards he received an anonymous call telling him where to find his bag,” he said. “They took all his money but returned his documents.”

On Sunday, the two condemned men, Alireza Mafiha, 23, and Mohammad Ali Sarvari, 20, stood before the onlookers, many of whom said they were family members and friends.

“They have shaved his hair,” said one young man pointing at Mr. Mafiha who said he knew both men. Mr. Sarvari, baby-faced, stared wide-eyed into the crowd.

The two men, both unemployed and from poor families, had been caught two months ago on a security camera robbing a man and stabbing him, helped by two accomplices. Video from the crime spread on the Internet and caused a widespread uproar, prompting politicians and clerics to call for harsh measures.

Two weeks later, all four men were arrested. The head of Iran’s judiciary, Ayatollah Sadegh Larijani, made it clear in comments on the crime that even though their victim had not died, a death sentence for the two main defendants, Mr. Mafiha and Mr. Sarvari, was likely. “We need to act assertively and increase the costs for those committing street crimes,” he said, according to the semiofficial Fars news agency.

Ramtin Rastin contributed reporting.

This article has been revised to reflect the following correction:

Correction: January 20, 2013

An earlier version of this story and a picture caption misstated the ages of the two men who were executed. Alireza Mafiha was 23 and Mohammad Ali Savari was 20.

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The Boss: New Leaders Inc. C.E.O. on Giving Children a Chance

I AM the youngest of 10 children in my family, and the only one born in the United States. My father was a municipal judge who fled Haiti during the Duvalier regime. He and my mother settled in the Bedford-Stuyvesant area of Brooklyn, but could not initially afford to bring over my four brothers and five sisters, who stayed in Haiti with relatives.

Jean S. Desravines is the chief executive of New Leaders Inc. in New York.

AGE 41

FAVORITE PASTIMES Karate and taekwondo

MEMORABLE BOOK "How Children Succeed: Grit, Curiosity and the Hidden Power of Character," by Paul Tough

Since he did not speak English fluently, my father worked as a janitor and had a second job as a hospital security guard. He later took a third job driving a taxi at night to pay for my tuition at Nazareth Regional High School, a Roman Catholic school in Brooklyn. My parents were determined that I was going to get a good education, and wanted to keep me away from local troubles, which did claim two of my childhood friends.

Working so many jobs overwhelmed my father. He had a heart attack and died at age 59 behind the wheel of his taxi. My mother found it difficult to cope without my father and moved back to Haiti in 1989 with two of my siblings. I thought I would have to leave school because I had no money for tuition, but Nazareth agreed to pay my way.

I wound up sleeping in my car for almost three months, showering at school after my track team’s practice. I also held down two jobs, both in retailing, and one of my sisters and I rented a basement apartment in East Flatbush.

After graduating from high school in 1990, I attended St. Francis College in Brooklyn, on athletic and academic scholarships. I worked first at the New York City Board of Education, where H. Carl McCall was president, then in his office after he became New York State comptroller. I later worked in the office of Ruth Messinger, then the Manhattan borough president.

I broadened my nonprofit organization experience at the Faith Center for Community Development while earning my master’s of public administration at New York University. I married my high school sweetheart, Melissa, and we now have two children.

In 2001, I began to work toward my original goal — improving educational opportunities for children — and joined the city’s Department of Education. I was later recruited under the new administration of Mayor Michael R. Bloomberg to help start a program as part of his Children First reforms.

In 2003, I became the Department of Education’s executive director for parent and community engagement, and, two years later, senior counselor to Joel I. Klein, then the school chancellor. He taught me a great deal about leadership and how to change the education system. But I began to realize public education could not be transformed without great principals who function like C.E.O.’s of their schools.

So in 2006 I returned to the nonprofit world, to New Leaders, a national organization founded in 2000 to recruit and develop leaders to turn around low-performing public schools. Initially, I managed city partnerships and expanded our program in areas like New Orleans and Charlotte, N.C.

In 2011, I became C.E.O., and revamped our program to produce even stronger student achievement results, streamlined our costs, diversified funding sources and forged new partnerships. We have an annual budget of $31.5 million, which comes from foundations, businesses, individuals and government grants, and a staff of about 200 people at a dozen locations.

We have a new partnership with Pearson Education to provide greater learning opportunities to public school principals. The goal of these efforts is to have a great principal in each of our nation’s public schools — to make sure that, just as I did, all kids get a chance at success.

As told to Elizabeth Olson.

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