More than 170 volunteers in the Brattleboro, Vt., area have contributed urine to the Rich Earth Institute field trials. Mike Earley/Courtesy of Rich Earth Institute hide caption

itoggle caption Mike Earley/Courtesy of Rich Earth Institute

Chief Medical Resident Dr. Julia Vermylen (right) critiques interns during an "intern boot camp," held at Chicago's Northwestern Memorial Hospital in June. Stacy Thacker/AP hide caption

itoggle caption Stacy Thacker/AP

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

itoggle caption Samadelli Marco/EURAC

Yonathan Zohar, Jorge Gomezjurado and Odi Zmora check on bluefin tuna larvae in tanks at the University of Maryland Baltimore County's Institute of Marine and Environmental Technology. Courtesy of Yonathan Zohar hide caption

itoggle caption Courtesy of Yonathan Zohar

A fisherman pulls a basket filled with anchovies aboard a fishing boat off of Peru's northern port of Chimbote, in 2012. Peru is the world's top fishmeal exporter, producing about a third of worldwide supply. Enrique Castro-Mendivil/Reuters/Landov hide caption

itoggle caption Enrique Castro-Mendivil/Reuters/Landov

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

itoggle caption Dean Bergmann/iStockphoto

First Lt. Patrick Romanofski (center) and 2nd Lt. Andrew Beckner (left) practice the launch of nuclear weapons. Promotions are now more strongly influenced by hands-on performance in this simulator. R.J. Oriez/U.S. Air Force hide caption

itoggle caption R.J. Oriez/U.S. Air Force