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Re: Earth's wobble killed off mammal species

 I read somewhere that the average species span for a Pleistocene mammal
was 900,000 years. Longer for a Pleistocene bird. Does this mammalian
species span hold true for all time periods?


Ian Paulsen
Bainbridge Island, WA, USA
A.K.A.: "Birdbooker"
"Rallidae all the way!"