North Korea: Why Should We Worry?

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North Korea: Why Should We Worry?         War rhetoric follows a historic cycle, but what if the outcome was different this time? Read More WATCH VIDEO: Pilots Get Stress Disorders Too Drone pilots do their work from a remote location, but that doesn't keep them out of harm's way. Dark Lightning Poses Radiation Risk         Dark lightning, flashes of gamma rays that occur at altitudes in which commercial aircraft fly, doesn't produce much light, but it does produce radiation. Read More WATCH VIDEO: Dark Matter: It's Not A Death Ray Dark matter makes up an estimated 80 percent matter in the universe. And, amazingly, we've never seen it! Until now. Home Run Hitter? Look at the Face         Baseball players with wider faces consistently performed better over a season, according to a new study. Read More WATCH VIDEO: Weird Japanese Sport Botaoshi Explained What looks like a violent mash-up of rugby, king of the hill and capture the flag is a competition played in some Japanese schools. Fish Fossil Shows Why Humans Have Two Arms, Legs         An unusual prehistoric fish with fins near its butt has helped to solve the mystery over why most animals, including humans, have paired limbs. Read More WATCH VIDEO: Crazy Animal Defenses A frog that breaks its own bones to create deadly stabbing weapons! This and more. 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