Researchers are looking at ways to get kids to pick healthier foods in their school cafeterias. One middle school found that when they put chocolate milk 6 inches behind white milk, many kids suddenly opted for the white milk instead. The school pictured wasn't involved in the study. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP

Peter Sherry demonstrates a hamstring stretch. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

Bee colonies across the country are dying because of colony collapse disorder, and researchers say a combination of a virus and a fungus could be playing a key role in the bees' sickness. Christopher Tompkins/iStockphoto.com hide caption

itoggle caption Christopher Tompkins/iStockphoto.com

Carrot farmers are banking on a $25 million ad campaign to make carrots as cool as junk food. Crispin Porter + Bogusky via AP hide caption

itoggle caption Crispin Porter + Bogusky via AP

Rachel Bateman, 9, has braces to correct an overbite. Her orthodontist opted not to use expanders to expand her upper arch. Mike Ruocco/NPR hide caption

itoggle caption Mike Ruocco/NPR

This computer illustration shows a kidney stone in the renal pelvis. Although a major component of kidney stones is calcum, a new study shows that a calcium-rich diet may help inhibit their development. 3D Clinic/Getty Images hide caption

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Keeping an active mind by doing things like playing chess helps stave off the development of dementia. Bulent Kilic/AFP via Getty Images hide caption

itoggle caption Bulent Kilic/AFP via Getty Images

A supporter of the Spanish team cries while watching the World Cup final soccer match, which Spain won 1-0.  Crying may have evolved as a signal to those who were in close physical proximity to us, but it also adds a powerful dimension to interpersonal communication Dani Pozo/AFP/Getty Images hide caption

itoggle caption Dani Pozo/AFP/Getty Images

Owen Levine, 3, helps make a broccoli and pineapple pizza for Meatless Monday. Colleen Levine hide caption

itoggle caption Colleen Levine