Know Your Zombies: ‘The Walking Dead’ ReturnsKnow Your Zombies: ‘The Walking Dead’ ReturnsKnow Your Zombies: ‘The Walking Dead’ Returns

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The Walking Dead' Returns: Know Your Zombies         Arguably the single most popular show on TV, 'The Walking Dead' is the latest zombie story to eat our brains. Read More WATCH VIDEO: Why We're Obsessed With Zombies They're everywhere these days! Why do they capture our attention? Take the Friday News Quiz         In this week's edition: New York City cockroaches, mummified heads and $100 bills. Read More WATCH VIDEO: New $100 Bill Is Crazy High-Tech The redesigned bill is finally out and loaded with enhanced security features. Water Found in Shredded Planetary Debris         Astronomers have made the first direct detection of water in a rocky body that once orbited a sun-like star. Read More WATCH VIDEO: The Hunt for a Second Earth Scientists think they may have found not just one, but three! Which Evolved First: Hands or Feet? Video         It's a question in our human evolution we've still been unsure about: Did we develop our hands or feet first? 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