How Aliens Can Find Us (and Vice Versa)

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How Aliens Can Find Us (and Vice Versa)         How might aliens stumble upon our planet? And could we spot them first? Read More WATCH VIDEO: Could Aliens Attack? In the movies mankind often fights off alien invasion. But could a race of intergalactic beings really attack us? What It Takes to Make a Nuclear Bomb         Iran is getting closer to creating a nuclear bomb, a new report finds. What's involved and how close are they? Read More WATCH VIDEO: Measuring Nuclear Disasters Nuclear accidents are measured in their severity with the International Nuclear and Radiological Event Scale. Asteroid Flyby Photographed in Infrared         Finally, Keck astronomers snapped the image everyone had been waiting for: the first infrared observation of Asteroid 2005 YU55. Read More WATCH VIDEO: Asteroid vs. Meteorite Do you know the difference between an asteroid and a meteorite? Mite Fossilized While Sucking on Spider's Head         About 49 million years ago, a mite decided to hitch a ride on a spider's head; then a blop of tree resin fell on them. Read More WATCH VIDEO: In The Field: Dino Base Camp A lot can happen at the base camp of a dinosaur dig, including saving a bird's life. 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