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SUMMARY; CHARSET=UTF-8 :GSI Seminar Series - Dan Mills 'Reassessing the “hard-steps” model for the evolution of intelligent life'
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URL:http://www.exeter.ac.uk/events/details/?event=14117
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ATTACH: http://www.exeter.ac.uk/events/details/?event=14117
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LOCATION:Laver Building LT3
DESCRIPTION; CHARSET=UTF-8 :According to the “hard-steps” model (HSM), the evolutionary origin of humans depended on a small number of key intermediate “steps” that were inherently unlikely to occur during Earth’s habitable lifespan – thereby making humans an unlikely product of biological evolution. Likewise, the HSM predicts that human-like life beyond the Earth is “exceedingly rare.” In this talk, Dan Mills will critically evaluate these core assumptions of the HSM and propose an alternative scenario: “hard steps” – as originally defined – simply do not exist, and the timing of many key evolutionary transitions necessary for human origins occurred when they did (and not much earlier) due to the sequential and unidirectional opening of different global-environmental “windows” of habitability over Earth history.http://www.exeter.ac.uk/events/details/?event=14117
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