Are fourth-down attempts really a bad decision? Mathematics pounds this sort of conventional wisdom into the turf. Statistical analyses have shown that to give their team the best chance of winning, coaches should go for it more on fourth down. A lot.

A Google Earth map that raised rumors of the lost city of Atlantis has gotten a much-needed update, ridding the seafloor of a gridlike pattern that some vigilant users suspected were sunken streets from the mythological underwater city.

Jellyfish have become the subject of what resembles a modern myth, some say.

It may seem a prestigious post for a rodent, but the guinea pigs that are fixtures in elementary school classrooms today were once ambassadors from a new land.

A one-of-a-kind fossil shows that so-called bat flies — tiny vampire insects that survive on the blood of bats — have been parasitizing the winged mammals and spreading bat malaria for at least 20 million years, scientists report in a pair of studies Friday.

Science editor Alan Boyle's blog: Visualizing science has come a long way since the days of overhead projectors — to see how far we've come, check out the winners of a competition that highlights the artistic side of science and engineering.

Scientists on an expedition to sample a deep-sea trench got a surprise when their traps brought back seven giant crustaceans glimpsed only a handful of times in human history.

Men are from Mars and women are from Venus, but how did they get there? Our gender differences might be a function of how our brains react to hormones, a new study on mice suggests.

What if we had a glass window into the brain that lets us look inside? For the first time ever, a team of physicists, chemists and biologists has done just that. Led by a microscopy pioneer, they peered into a living mouse's brain using powerful technology.

Humpback whales living on different sides of the southern Indian Ocean bellow very different songs, suggesting the behemoths don't mingle much, or at least they aren't freely sharing their musical material, a new study finds.

Hundreds of species never before seen in a Peruvian national park have been found during an inventory of the Amazonian forests there, according to a conservation group.

A "Mona Lisa" copy owned by Spain's Prado Museum was almost certainly painted by one of Leonardo da Vinci's apprentices alongside the master himself as he did the original, museum officials said Wednesday.

Like something out of reality TV, scientists released pairs of small lizards onto tiny uninhabited islands in the Bahamas and watched what happened. The reptiles played for survival, allowing the voyeuristic researchers to witness the interaction between evolutionary processes rarely observed in nature.

On Thursday, a roly-poly rodent named Punxsutawney Phil was hoisted from his burrow in front of TV cameras and cheering crowds and called upon to predict the weather. Phil saw his shadow, which, according to legend, means that winter is here to stay for six more weeks. Weird tradition, huh?

Jenni Lake gave birth to a baby boy the month before her 18th birthday, though she was not destined to become just another teenage mother.

Just a few months ago the future seemed impossibly bleak for Elisa and Nathan Bond, young parents who had both been diagnosed with late stage cancers. But just this week the couple got the news that Elisa’s cancer had finally responded to therapy and disappeared.

The news anchor tells Ann Curry about the next step in her treatment to beat breast cancer.

Even if the worst nuclear accident in 25 years leads to many people developing cancer, we may never find out. The ordinary rate of cancer is so high, and our understanding of the effects of radiation so limited, that an increase in cases from the Fukushima disaster may be undetectable.

Lindsey Miller, 26, posted a video on YouTube asking actor Joseph Gordon-Levitt out for coffee.

Dermatologists will soon get some high-tech help deciding which suspicious-looking moles should be removed and checked for melanoma, the deadliest form of skin cancer.

When patients diagnosed with advanced cancer need to talk, they find Marcy Zaffron. He is the quality of life navigator at Albuquerque's Presbyterian Healthcare Services' Cancer Center, who works with mostly Stage IV cancer patients.

Most people rage at the universe when they're diagnosed with breast cancer. Me? I scheduled a pin-up shoot. While my family focused on saving my life, to me, it was all about my boobs. I liked them, and, as a single woman, I felt they still came in handy.

Terry Dyroff's PSA blood test led to a prostate biopsy that didn't find cancer but gave him a life-threatening infection.

A drug that millions of pregnant women took decades ago to prevent miscarriage and complications has put their daughters at higher risk for breast cancer and other health problems that are showing up now, a new federal study finds.

For the past three decades, Uncle Sam has been providing a handful of patients with some of the highest grade marijuana around.

Giving breast cancer patients radiotherapy and chemotherapy at the same time significantly cuts the risk their tumors will come back and should be considered as a new treatment approach across the world, cancer experts said on Sunday.

A teenager who collected $17,000 in donations after telling people she was dying of leukemia and had only had six months to live faces theft charges after police determined she lied.

Healthier lifestyles and better diets could prevent up to 2.8 million cases of cancer each year, the World Cancer Research Fund (WCRF) said on Wednesday, calling on governments to "avoid a public health disaster."

Women with diets rich in vegetables, fruit and legumes may have a somewhat decreased risk of developing one type of breast cancer, a new study suggests.

Male firefighters who were exposed to toxic dust and smoke from the 9/11 attacks on New York's World Trade Center have a 19 percent higher risk of getting cancer of all kinds than colleagues who were not exposed, U.S. researchers said Thursday.

Children and adolescents who use mobile phones are at no bigger risk of developing brain cancer than non-users, according to a study of patients aged 7 to 19.

According to a new study examining 10 years of marathon and half-marathon races in the U.S., the risk of cardiac arrest in such long distance races is actually quite rare

Cage Fitness and other mixed martial arts-inspired workouts mimic the structure of a championship MMA bout -- minus the injury.

Despite the cold and many other potential hazards, naked from the ankle down is the way Anna Toombs likes it, and she gets plenty of catcalls in the street as a result.

Yoga has been a way of life for 91-year-old Bernice Bates since 1960. In a fitting tribute to her decades of helping others learn her passion, she recently won the distinction of the Guinness World Record holder of oldest yoga instructor.

Looking for healthy inspiration? SELF found it in every corner of the country as the magazine presents its 11th annual  ranking of America's best cities for women.

Women are hitting the weight room in record numbers, and a new study found that weight-training injuries among women have jumped a whopping 63 percent. Here are the most common slipups and how to fix them, so you leave the gym strutting — not limping.

When it comes to getting fit a person's best friend just might be a four-legged one.

There's nothing like a week in paradise to derail a fitness regimen. Plucked from routine and surrounded by temptation, even the most health-conscious vacationers can find themselves torn between exercise and excess.

Distracted exercising may come with risks similar to those of distracted driving: Last year, for the first time in four years, pedestrian deaths rose — experts are blaming our beloved, never-leave-home-without-'em gadgets.

There are many things you can say about leggings, but most women who wear them will reduce it to one word: comfortable. Yet the super-comfy wardrobe staple recently caused a stir in the blogosphere when the U.K.'s Daily Mail reported on why the popular stretchy pants can make you fat.

Runners World: After 81 years, Clarence Hartley is finally running the Boston Marathon . What took him so long? First there were two wars — Korea and Vietnam — where he served in the United States Air Force. Then he spent years stationed in Taiwan, Japan, Thailand, Germany, and England. More recently, he battled lymphoma and prostate cancer. But on April 18, Hartley will set off on a well-deserved journey from Hopkinton to Copley Square.

Linda Fondren, a 55-year-old mother from Vicksburg, Miss, is on a mission to reshape her state.

Get in shape at the office with equipment that can, among other things,  turn your work chair into a punching bag — or a balance ball — or add some 'arms' to it so you can set up a resistance training regime.

Good news: Sex is safe for most heart patients. If you're healthy enough to walk up two flights of stairs without chest pain or gasping for breath, you can have a love life.

Heavy D died of deep leg vein thrombosis, exacerbated by his weight, a pre-existing heart condition and a Transatlantic flight, said the Los Angeles County Coroner. Blood clots, caused by long periods of sitting, have been linked to air travels for decades. Find out what you can do to prevent them.

India's largest maker of generic drugs won approval Wednesday to sell a generic version of cholesterol blockbuster Lipitor. The world's top-selling drug ever lost U.S. patent protection earlier in the day.

Thanks to the medical detectives at the nation’s first mystery disease clinic, Louise Benge now knows why her legs feel like they’ve turned to stone. 

New research shows that higher than normal levels of vitamin D can cause the heart to beat too fast and out of rhythm, a condition called atrial fibrillation.

In a spectacular turnabout, hospitals are treating almost all major heart attack patients within the recommended 90 minutes of arrival, a new study finds. Just five years ago, less than half of them got their clogged arteries opened that fast.

A new study finds that a drug used to quit smoking dramatically increases risk of heart attack. NBC's Erika Edwards reports. (NBC News)

Technology world mourns passing of semiconductor leader

Hopes TSMC will follow the script

Another four bite the dust

Another four bite the dust

Blames floods and the European crisis

Claims Motorola refuses to license its patent

Might hold an event in February, but not for a product

From Ninja Video to Napster

Great for portability but let down by poor battery life

Will nick the NT OS kernel from Windows 8

Want Apple to be fair to its workers

Cool your boots, Mr Page

Could see service by mid-2013

Will support nationwide protests

Will set up an electronic crime investigation unit

The Google OS takes nearly 50 per cent market share

The classic freebie lure

As sports star admits he has used illegal web sites

Sides with Lookout against Symantec

Updated

Agents discuss arrested hackers in clunky call

Might be a budget model

Paid tradesman in social network shares

The movie studio moguls are wrong

If it looks dodgy, it’s not getting in

Apparently a flight risk

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