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.

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Bank of Japan Expands Efforts to Prop Up Nation’s Economy

TOKYO (AP) — Bowing to government pressure, Japan’s central bank on Tuesday pledged more aggressive action to lift the economy, including setting a 2 percent inflation target.

The Bank of Japan said it would conduct “open-ended” asset purchases to help achieve the goal of breaking out of a long spell of deflation.

Prime Minister Shinzo Abe had urged the central bank to ease monetary policy further to prop up the economy.

Whether the effort will succeed remains to be seen: the central bank has not achieved even its 1 percent inflation target, with price increases hovering below 0.5 percent for the past two years despite surges in energy costs.

The central bank described its inflation goal as a “price stability target.” It said: “Under the price stability target, the bank will pursue monetary easing and aim to achieve this target at the earliest possible time.”

But it said it would also “ascertain whether there is any significant risk to the sustainability of economic growth, including from the accumulation of financial imbalances.”

Among the risks are a ballooning public debt, already well over twice the size of Japan’s gross domestic product.

Mr. Abe’s government is seeking to spur growth both through heavy spending on public works and other projects and through monetary easing. The central bank’s announcement on Tuesday was in line with expectations.

The government was determined that the central bank set a 2 percent inflation target, the trade minister, Toshimitsu Motegi, told reporters on Monday. “We want a clear inflation target to aim for,” Mr. Motegi said. “Other countries have inflation targets, and it’s not just 1 percent. They are all at least 2 percent,” he said.

He said the monetary easing, which has involved tens of trillions of yen (hundreds of billions of dollars) in asset purchases and years of near-zero interest rates, so far had been “inadequate.”

The Abe government is expected to nominate as Bank of Japan governor an expert known to favor its policies when the term of the current governor, Masaaki Shirakawa, ends this spring.

However, Mr. Motegi rejected accusations that the government’s demands were meant to erode the central bank’s independent status.

“We are not doing this to gang up and pick on Mr. Shirakawa,” he said. But he added that “the policy of aiming to escape deflation will not change, not today, not tomorrow or the day after tomorrow.”

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Clara Jane Nixon dies at 93; sister-in-law of President Nixon

Her famous brother-in-law had not yet been elected president. But he already had been vice president, as well as a U.S. senator and a congressman from California, and Clara Jane Nixon wanted to preserve some of his family history.

So, beginning in 1967, the Newport Beach housewife set out to track down and collect the furniture, books and other belongings that had filled the modest boyhood home of Richard M. Nixon. She hoped that one day the artifacts might be displayed in a museum.

With the help of other family members, the wife of F. Donald Nixon, a brother of the future president, found and preserved hundreds of items from his childhood home in Yorba Linda, including the piano on which he took lessons, the table where his family ate its meals and the china and crystal his parents received as wedding gifts.

PHOTOS: Notable deaths of 2012

She found the high chair he used as a toddler, the bed on which he was born and the quilt, dating from 1875, that had been used to cover it. The furnishings and other belongings of the Nixon family are displayed in the 900-square-foot farmhouse, a museum near the Richard Nixon Presidential Library in Yorba Linda.

"Clara Jane was just essential to all those artifacts being saved," her brother-in-law Ed Nixon said in a phone interview Sunday. "We're very thankful she was there all these years and for everything she did to preserve the family history."

Clara Jane Nixon died Thursday at a convalescent facility in Irvine where she was receiving care after a recent fall at the home where she had moved after her husband's death in 1987, family members said. She was 93.

She was born Clara Jane Lemke on Nov. 16, 1919, in Westmoreland, a community in Imperial County where her parents were homesteading. She weighed in at less than five pounds, according to the scale — normally used for weighing chickens — that her father employed for the task, her daughter LawreneAnfinson said in a phone interview.

She grew up in Placentia, where her parents, Lawrence and Mae Lemke, were citrus farmers. After graduating from Fullerton High School, she attended Sawyer Business College in Westwood and later worked as a secretary at a law firm.

In 1940, when she was 20, she was introduced to F. Donald Nixon, who was her third cousin on her mother's side. They dated for just three weeks before he asked for her hand, and they were married on Aug. 9, 1942. They had three children: daughter Lawrene, who was named for her grandfather Lawrence, and sons Donald and Richard.

Their son Richard Calvert Nixon died in 2002. In addition to her daughter and her son Donald, Clara Nixon's survivors include six grandchildren and eight great-grandchildren.

In later years, after President Nixon resigned in disgrace on Aug. 9, 1974, his youngest brother was often asked about the significance of the date.

"Whenever anyone asked me, I would say, 'Well, it was Don's and Clara Jane's 32nd anniversary,'" Ed Nixon said.

rebecca.trounson@latimes.com

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Wired Science Space Photo of the Day: Soap Bubble Nebula

Informally known as the "Soap Bubble Nebula", this planetary nebula (officially known as PN G75.5+1.7) was discovered by amateur astronomer Dave Jurasevich on July 6th, 2008. It was noted and reported by Keith Quattrocchi and Mel Helm on July 17th, 2008. This image was obtained with the Kitt Peak Mayall 4-meter telescope on June 19th, 2009 in the H-alpha (orange) and [OIII] (blue) narrowband filters. In this image, north is to the left and east is down.

PN G75.5+1.7 is located in the constellation of Cygnus, not far from the Crescent Nebula (NGC 6888). It is embedded in a diffuse nebula which, in conjunction with its faintness, is the reason it was not discovered until recently. The spherical symmetry of the shell is remarkable, making it very similar to Abell 39.

Image: T. A. Rector/University of Alaska Anchorage, H. Schweiker/WIYN and NOAO/AURA/NSF [high-resolution] Read NOAO Conditions of Use before downloading

Caption: NOAO

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Manti Te’o to be interviewed by Katie Couric

NEW YORK (AP) — Notre Dame linebacker Manti Te‘o will be interviewed by Katie Couric, the first on-camera interview given by the All-American since news broke about the dead girlfriend hoax.

Te’o and his parents will appear on Couric’s syndicated talk show Thursday. ABC News announced the interview Sunday, but gave no details as to when it will take place and where.

Te’o gave an off-camera interview with ESPN on Friday night. He insists he was the victim of the hoax, not a participant. The Heisman Trophy runner-up said he had an online romance with a woman he never met and in September was informed that the woman died from leukemia.

Te’o told ESPN that the person suspected of being the mastermind of the hoax has contacted him and apologized.

Entertainment News Headlines – Yahoo! News

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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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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.

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A Google-a-Day Puzzle for Jan. 20

Our good friends at Google run a daily puzzle challenge and asked us to help get them out to the geeky masses. Each day’s puzzle will task your googling skills a little more, leading you to Google mastery. Each morning at 12:01 a.m. Eastern time you’ll see a new puzzle posted here.

SPOILER WARNING:
We leave the comments on so people can work together to find the answer. As such, if you want to figure it out all by yourself, DON’T READ THE COMMENTS!

Also, with the knowledge that because others may publish their answers before you do, if you want to be able to search for information without accidentally seeing the answer somewhere, you can use the Google-a-Day site’s search tool, which will automatically filter out published answers, to give you a spoiler-free experience.

And now, without further ado, we give you…

TODAY’S PUZZLE:

Note: Ad-blocking software may prevent display of the puzzle widget.

Ken is a husband and father from the San Francisco Bay Area, where he works as a civil engineer. He also wrote the NYT bestselling book "Geek Dad: Awesomely Geeky Projects for Dads and Kids to Share."

Read more by Ken Denmead

Follow @fitzwillie and @geekdads on Twitter.

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“Beasts of Southern Wild,” “Les Miz” among Costume Designer Award nominees

LOS ANGELES (TheWrap.com) – Films as diverse as “Beast of the Southern Wild” and “Les Miserables” were among the nominees for the 15th annual Costume Designers Guild Awards announced Thursday by the organization.

Stephani Lewis was nominated for “Beasts” in the contemporary film category, along with Louise Stjernsward for “The Best Exotic Marigold Hotel,” Mark Bridges for “Silver Linings Playbook,” Jany Temime for “Skyfall” and George L. Little for “Zero Dark Thirty.”

Paco Delgado was nominated in the period film group, along with Jacqueline West for “Argo,” Jacqueline Durran for “Anna Karenina,” Joanna Johnston for “Lincoln” and Kasia Walicka-Maimone for “Moonrise Kingdom.”

The winners of the seven competitive awards will be announced at a gala on Tuesday, February 19, at the Beverly Hilton Hotel.

A special Lacoste Spotlight Award will be presented to Anne Hathaway. Producer, writer, comedian and creator of “Saturday Night Live” Lorne Michaels will receive the Distinguished Collaborator Award. Honorary Career Achievement Awards will be presented to costume designers Judianna Makovsky and Eduardo Castro for their outstanding work in film and television.

The other nominees:

Fantasy Film

“Cloud Atlas,” Kym Barret, Pierre-Yves Gayraud;

“The Hunger Games,” Judianna Makovsky;

“Mirror Mirror,” Eiko Ishioka;

“Snow White and the Huntsman,” Colleen Atwood

Contemporary TV Series

“Girls,” Jennifer Rogien;

“Nashville,” Susie DeSanto;

“Revenge,” Jill Ohanneson;

“Smash,” Molly Maginnis;

“Treme,” Alonzo Wilson, Ann Walters

Period/fantasy TV Series

“Boardwalk Empire,” John Dunn, Lisa Padovani;

“Downton Abbey,” Caroline McCall;

“Game of Thrones,” Michele Clapton;

Made for TV Movie or Mini Series

“American Horror Story: Asylum, Season 2,” Lou Eyrich;

“Hatfields & McCoys,” Karri Hutchinson;

“Hemingway & Gellhorn,” Ruth Myers

Commercials

Capital One: Couture, Roseanne Fiedler;

Captain Morgan Black, Judianna Makovsky;

Dos Equis: Most Interesting Man in the World, Julie Vogel

Movies News Headlines – Yahoo! News

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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 Richter’s 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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