Laury Sacks and her husband, Eric. The actress and writer developed frontotemporal dementia in her late 40s and died in 2008 at age 52. Courtesy of Eric Sacks hide caption

A helmet and pads won't prevent every fracture — but they help. iStockphoto hide caption

Headlamps make cold nights cozier, but leave the fuel-burning lanterns and stoves outside. Gopal Vijayaraghavan/Flickr hide caption

Good luck getting there! iStockphoto.com hide caption

The healthy human foot's outer arch may be more flexible than previously thought. iStockphoto hide caption

Whether or not you'll someday get cancer or any disease can feel like a roll of hundreds of dice. Calculating the odds --€” and knowing what they mean --€” is tricky. Katie Harbath/Flickr hide caption

Ray Copeland, a football coach at Bishop McGuinness High School, puts his players through a workout in Oklahoma City in 2007. As is often the case in much of the U.S., the first day of high school football practice that year began in a heat wave. AP hide caption

Is Oprah Winfrey a celebrity for the ages? Surian Soosay/Flickr hide caption

S.pneumoniae bacteria may look harmless, but don't rile them. CDC hide caption

Feeling lucky? Smoke-filled casinos cloud the health outlook for workers and gamblers alike. William Thomas Cain/Getty Images hide caption

Buzz, Georgia Tech's mascot, wasn't the only bug in the students' midst last fall. An outbreak of bacterial pneumonia sickened at least 83 in what the CDC called the largest known outbreak at a university in 35 years. Collegiate Images/Getty Images hide caption

The bite of a cobra can paralyze its victims and, if enough venom is released, fatally stop their breathing. It's estimated that more than 75 percent of patients in India who die from a snake's bite never make it to the hospital. STRDEL/AFP/Getty Images hide caption

The roots of obesity are complex and include genetics and other factors beyond individual choice, research shows. iStockphoto.com hide caption

Swanton's customers and other farm stand customers like paying through the honor system, but why? shanestar/Flickr.com hide caption

Should she know that this moment was made possible by an egg donor? iStockPhoto.com hide caption

Beware of throw-away aluminum roasting pans, burn doctors say. James Bo Insogna/iStockphoto.com hide caption

Do you want bacon with your sausage? Maybe not. iStockphoto.com hide caption

Taking huge amounts of vitamin D might not be the greatest idea. iStockphoto.com hide caption