Most teenagers with mental health problems don't get any help. iStockphoto hide caption

A 16th century woodcut shows the interior of a kitchen. In medieval Europe, cooks combined contrasting flavors and spices in much the same way that Indian cooking still does today. Paul Lacroix/Wikimedia hide caption

Hey, I'm not texting. Surely this is safe. iStockphoto hide caption

Women and younger students were more likely to drink less after alcohol-education programs. iStockphoto hide caption

If your idea of fun is being falling-down drunk, there's plenty for you on YouTube. iStockphoto hide caption

A slice of pork belly, with a thick layer of fat. "If we confirm that fat is a basic taste quality, it's the equivalent of saying chartreuse is a primary color," Richard Mattes of Purdue University says. "It changes our basic understanding of what taste is." Xiao He/Flickr hide caption

Chef David Iott explains the perfect way to prepare risotto to Stanford students. Courtesy of Stanford's Residential and Dining Enterprises hide caption

No oven necessary: Hu makes her pumpkin cake in the microwave. Courtesy of Emily Hu hide caption

A marijuana bud displayed in Denver. Don't legalize pot, the pediatricians say, but don't lock teenagers up for using it, either. Seth McConnell/The Denver Post/Getty Images hide caption