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Bill Sloman
Guest
Yestrday's Proceedigns of the National Academy of Science had an interesting paper
https://www.pnas.org/content/pnas/early/2019/02/27/1813901116.full.pdf
The argument is that the solar system is chaotic over periods of longer than 60 million years, but that there's enough evidence in the geological record to reveal what was going on more than 60 million years ago, up to 250 million years ago.
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Bill Sloman, Sydney
https://www.pnas.org/content/pnas/early/2019/02/27/1813901116.full.pdf
The argument is that the solar system is chaotic over periods of longer than 60 million years, but that there's enough evidence in the geological record to reveal what was going on more than 60 million years ago, up to 250 million years ago.
--
Bill Sloman, Sydney