Eduard Egarter-Vigl (left) and Albert Zink (right) sample Italy's mummified iceman for genetic analysis in November 2010. Previous research suggests he, too, was predisposed to heart disease. Samadelli Marco/EURAC hide caption

The U.S. Geological Survey found that neonicotinoids are leaching into streams and rivers in the Midwest, including the Missouri River, shown here in Leavenworth, Kan. Dean Bergmann/iStockphoto hide caption

Food companies spend a lot of time and resources coming up with the perfect plastic packaging to keep their products fresh. iStockphoto hide caption

Oh, I don't wanna share you with nothing else, I gotta have you to myself. iStockphoto hide caption

Film CT scans show these people have suffered strokes. stockdevil/iStockphoto hide caption

Gorillas in Virunga National Park in Democratic Republic of Congo, in 2013. Great apes like the gorilla have become increasingly threatened by the expansion of palm oil production in Africa. Brent Stirton/WWF/Canon/Getty Images hide caption

A study of twins shows why being a good reader and a good math student may go hand in hand. iStockphoto hide caption

Leave it to the Italians to design a capsule-based espresso system for astronauts who miss their morning cup. Andrea Guermani/Courtesy of Lavazza hide caption

This could be just a moment's fun, or the beginning of a lifelong addiction. Colin/Flickr hide caption

Had a bit too much fun in your 20s? iStockphoto hide caption

It makes our mouth water, but it makes our breath stink. Flickr hide caption

Girls who were arrested and detained were at particular risk for premature death in adulthood. iStockphoto hide caption

Goats graze in Detroit's Brightmoor neighborhood. Max Ortiz/Courtesy of The Detroit News hide caption

As Lindsay Lohan's character (far left) learned in the movie Mean Girls, popularity comes at a price. The Kobal Collection hide caption