See Photos of Astronauts' Moon Footprints

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Photos Show Astronauts' Tracks on the Moon         The twists and turns of three Apollo moon crews are revealed in new pictures taken by NASA's sharp-eyed Lunar Reconnaissance Orbiter. Read More WATCH VIDEO: Top 5 Moon Moments See astronauts singing and skipping on the moon. Dolphins Talk More Like Us         Dolphins communicate using a process very similar to the way humans speak. The finding could pave the way to communicating with the animals. Read More WATCH VIDEO: Dog Growls Decoded What your dog is really saying. Most Infamous Cold Cases: Photos         From Jack the Ripper to Jimmy Hoffa, take a tour of some of the most enduring unsolved crimes in history.  Read More WATCH VIDEO: JFK Assassination Conspiracies Secret Service agents address some of the conspiracy theories. What's Ailing Venus Williams?         Sjogren's syndrome mostly affects women and can be accompanied by other painful conditions, such as rheumatoid arthritis.  Read More WATCH VIDEO: Marathon Running Examined How safe it is for runners to push their bodies to the limit? 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