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"Wobbles in the Earth's orbit may explain the puzzling regularity with whichcut
new mammalian and other species appear and vanish in the fossil record,
a study has found.
Mammalian species tend to survive for an average of 2.5 million years before
Although the researchers did not venture a prediction of when the next
peak in turnover rates would be, extrapolation from the historical figures
they provided suggests it would come in slightly under 600,000 years."
[Nature Oct 12th, as reported by World-Science.]
, Jan van Dam of Utrecht University
in
Brian Whatcott Altus OK Eureka!
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