Evolving intelligent life took billions of years − but it may not have been as unlikely as many scientists predicted
Humans evolved late in Earth history. While this timing inspired the conclusion that humanlike life is a cosmic improbability ...
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Evolving intelligent life took billions of years − but it may not have been as unlikely as many scientists predicted
Do hard steps exist? The physicists Frank Tipler and John Barrow predicted that hard steps must have happened only once in the history of life – a logic taken from evolutionary biology.
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Evolving intelligent life took billions of years − but it may not have been as unlikely as many scientists predicted
The Sun's distance from Earth allows it to be habitable for life. DrPixel/Moment via Getty Images ...