Could We Detect an Alien Civilization's Waste Heat?

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Could We Detect an Alien Civilization's Waste Heat?         An extraterrestrial civilization would generate a heat signature that we may be able to detect. Read More WATCH VIDEO: Planetary Protection Officer John D. Rummel protects Earth from alien life, as well as alien life from Earth. Mummy-Making Began Long Before Pharaohs         Ancient Egyptians may have started mummifying their dead 1,500 years earlier than previously thought. Read More WATCH VIDEO: Why Did We Stop Building Pyramids? Why were they built, and what caused humans to stop building them? Shark vs. Dolphin Battles Can Have Surprising Outcomes         Dolphins have come up with some clever and effective ways of surviving shark attacks. Read More WATCH VIDEO: Dolphins Give Each Other Unique Names Dolphins actually give names to each other, new research suggests. How Stores Trick You Into Buying More Than You Need         Do you ever come out of a store with ONLY the purchases you planned to buy, before you went in? Here's how stores are fighting to keep that terrible thing from happening. 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 © 2014 Discovery Communications, LLC