Some Italian scientists say they've found conclusive proof that life on earth originated in space.
They've even managed to revive some of it. The idea that life on earth was seeded from space, perhaps having hitched a ride on comets or asteroids, isn't new. The concept is known as panspermia. But if the evidence found by the Italian researchers turns out to be valid, it would revolutionize our view of life's origins. The Italians say they found micro-organisms buried deep within ancient meteorites.