Quote:
Originally Posted by aussenseiter
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I am once again asking, what the hell are you taking about?
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My number was wrong but,
The sun is slowly increasing the amount of radiation it puts out. In about 600 million years*, the increased temperature from all the additional energy will likely make C3 photosynthesis (trees etc) impossible, followed not too long after by all other types of photosynthesis. Compared to the age of the Earth, the reign of intelligent life is relatively short.
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Btw this is also a paradox-- there is evidence of liquid oceans a
long, long time ago. How were there liquid oceans when the sun was 70% of luminous? So there may be something wrong with either our understanding of stellar nucleosynthesis, or primordial conditions of Earth.