Discovery News Daily: Tarantulas Trigger Brain's Fear Circuits

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Tarantulas Trigger Brain's Fear Circuits     Understanding which brain regions fail to function normally when confronted with fear could one day help treat people with phobias. Read More WATCH VIDEO: Spider Sex Explore the tangled web of poisonous spider sex. Earliest Burrow of Four-Legged Animal Found     This groundhog hole-like quarters has been traced to an amphibian that lived 350 million years ago. Read More WATCH VIDEO: X-Ray Vision Shows Dino-Era Bugs See fossilized bugs found in opaque amber. Light Pollution Dims Even the Brightest Stars     Why are the stars over Utah's Bryce Canyon National Park dimming? Read More WATCH VIDEO: Old Stars Find out why a star's age matters. Gamma Ray Bursts: Screaming Baby Black Holes?     How are gamma ray bursts generated? Is the exotic "magnetar" behind them? Or could the most powerful explosions in the universe be caused by newborn black holes?  Read More WATCH VIDEO: Our Own Black Holes Did you know there's a black hole in the center of our galaxy? At Discovery we value the 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