Other Earths, or not? (Introduction)
The two major books about how special the Earth is have titles 1) Privileged Planet & 2) Rate Earth. This is a commentary that tells some of the reasons why.The author thinks life is evolving elsewhere. I doubt it. With the speed of light(communication) and the distances involved, if life exists elsewhere we will never learn about it:-http://blogs.scientificamerican.com/life-unbounded/2012/12/26/should-we-expect-other-earth-like-planets-at-all/?WT_mc_id=SA_CAT_SPC_20121227
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