Is there another Earth somewhere outside our Solar System? Astronomers have pondered the question for centuries, but only in recent years have they actually found planets orbiting distant stars. Now, with new "extrasolar" planets being discovered almost daily, scientists are confidently training their telescopes on the biggest mystery of all: Is there life beyond Earth? SCIENCE BULLETINS are a production of the American Museum of Natural History… http://sciencebulletins.amnh.org/