How Strange Can Life Be?

TCS Daily
By Kenneth Silber

Peter D. Ward is a biologist with contrarian tendencies on various questions about extraterrestrial life. His 2000 book, Rare Earth, coauthored with astronomer Donald Brownlee, argued that complex life is probably uncommon in the universe, such that there is little prospect of encountering or even detecting any alien civilizations.
Naturally, this put Ward at odds with scientists involved in the Search for Extraterrestrial Intelligence, or SETI...

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