With billions of stars in our galaxy alone, many with their own Earth-like planets, how are we to know which ones might be habitable? Well, new research thinks we might just have the clue, and it all has to do with purple bacteria.
via Discovery News http://news.discovery.com/space/videos/a-purple-planet-may-mean-alien-life-video.htm#mkcpgn=rssnws1
via Discovery News http://news.discovery.com/space/videos/a-purple-planet-may-mean-alien-life-video.htm#mkcpgn=rssnws1
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