Tricky Sex Life of Giant Panda Revealed

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Giant Panda's Tricky Sex Life Revealed         Females are only "in the mood" for about a day -- three at the most -- each year. Read More WATCH VIDEO: Looking For Panda Pregnancy The National Zoo might have a panda pregnancy, but it can be difficult to tell. Space Station Astronauts Log One Million Photos         The astronauts and cosmonauts aboard the International Space Station have logged one million photos -- here's a small selection of our favorites. Read More WATCH VIDEO: New Space Toilets How NASA reinvents construction for the International Space Station. Trayvon Martin 911 Call: How Experts ID Voices         Voice recognition software can show the actual speech structure of the vocal cords to make a match. Read More WATCH VIDEO: What You Really Sound Like Do you hate how your voice sounds coming out of a machine? How Can a Tornado Send Semi Trucks Flying?         How is it possible that one tornado can send semi-trucks flying through the air, while another can tear off the roof of a house but not suck out the family hiding in the bathtub? Read More WATCH VIDEO: Fire Tornadoes Explained Two of nature's most horrifying elements in one package 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 © 2010 Discovery Communications, LLC