NASA Stepping Up Hunt for Scary Asteroids

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NASA Stepping Up Hunt for Scary Asteroids         NASA on Tuesday unveiled a multipurpose initiative to find, track and potentially relocate asteroids that may be on a collision course with Earth. Read More WATCH VIDEO: Favorite Chris Hadfield Moments We recount some of our favorite moments from the beloved ISS commander, space musician and teacher. Horse Sweat Detergent and More Smelly Secrets         Hippo sweat is red, horse sweat works like detergent, plus more details on sweat that you probably never knew. Read More WATCH VIDEO: 4 Animal Myths Exposed! Many of the things you think you know about animals are wrong! 6 Things You Shouldn't Lick         Here are half a dozen things you shouldn't put your tongue on -- and a couple you really should. Read More WATCH VIDEO: Why Do We Get Brain Freezes? Why does your head pound when you scarf down ice cream too fast? Do Fitness Trackers Work? Video         Fitness Trackers are the hottest new gadgets -- keeping tabs on every movement you make in the hopes of helping you get fit. But do they really help you achieve this goal or are they just money down the drain? 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