April 6, 2007
The Universe's Weird Bio-Friendliness
The origin of life is one of the great outstanding mysteries of science. We do not know whether life occurs because of an extraordinary fluke of chemistry that is unique to earth, or whether the universe is teeming with life. But either way, we can be sure of one thing: The universe permits life in at least one location. That basic fact, while blindingly obvious, conceals a subtle mystery about which scientists hold strong, and strongly differing, opinions.
To understand the problem,
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