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

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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

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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

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The human Y chromosome (left) holds the code for "maleness"; that's the X on the right. Andrew Syred/Science Source hide caption

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With Men's Y Chromosome, Size Really May Not Matter

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Why We Think Ignorance Is Bliss, Even When It Hurts Our Health

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We are all Russian nesting dolls: Our intestines house many bacteria, which house many viruses. These so-called bacteriophages are likely as important for our health as the bacteria they live in. Lisa Brown for NPR hide caption

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When It Comes To Thinking, 2 Fish Heads Are Better Than 1

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The CDC's director, Tom Frieden, testified before a congressional subcommittee Wednesday regarding a recent anthrax incident and lab safety improvements he is instituting. AFP/Getty Images hide caption

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Head Scientist At CDC Weighs Costs Of Recent Lab Safety Breaches

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Throwing out a pound of boneless beef effectively wastes 24 times more calories than throwing out a pound of vegetables or grains. Egg and dairy products fall somewhere between the two extremes. Morgan Walker/NPR hide caption

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