Olympics: How U.S. Athletes Fool Their Bodies

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Olympics: How U.S. Athletes Fool Their Bodies         Some U.S. Olympic athletes are using altitude instead of drugs to gain an edge in Sochi. Read More WATCH VIDEO: Extreme Sports Risk-Taking Explained Ever wonder why some people are more likely to take risks than others? Stunning Mars Impact Crater Spied         NASA's Mars Reconnaissance Orbiter's low-resolution Context Camera spots a fresh impact crater. Read More WATCH VIDEO: Water Found on Mars … FOR REAL! The Mars rover Curiosity tells us that Martian soil is 2 percent water! Bones of Europe's Charlemagne Confirmed: Photos         The bones interred at Charlemagne's supposed resting place belong to the emperor, scientists report. Read More WATCH VIDEO: Penises Have Bones?! Thought you knew how penises worked? You've got it all wrong! Can You Cut the Mold Off Food and Eat It? Video         You go and pick up the leftover pizza from last week, and you notice part of it is moldy. If you cut off that part, is it safe to eat it? Watch Follow Discovery News on Facebook! Get your sci-tech headlines all day on Twitter too! Follow us @Discovery_News. At Discovery we value your privacy. If you would like to be removed from Discovery News emails like this, please click here to our subscription center, where you can manage your account. We recently updated our privacy policy. This policy is effective as of 10/30/07. To see new policy click here . Discovery Communications, LLC One Discovery Place Silver Spring, MD 20910 © 2013 Discovery Communications, LLC