Monday, August 8, 2011
Different humanoid species throughout the universe?
So far we've discovered over 400 other planets orbiting distant stars in our galaxy alone, and those exoplanets are virtually in our own backyard, most of them being within 1,000 light years of Earth. Our galaxy is about 100,000 light years in diameter so the odds of there being thousands of other planets within it are very good. Certainly at least two planets -- Earth and one other -- have had life arise on them, and the odds for intelligence at some level being out there too are high. And the Milky Way is only one of several-hundred billion other galaxies in the universe, each containing billions of stars.
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