Re: [Phys-l] Extinction of Species

[Laurent Hodges <lhodges@iastate.edu>]

I wonder if a more correct description might be that the changes (in 
climate, etc.) produce rapid evolutionary changes in the species, from the 
"old" species to what we consider a "new" species.  I don't imagine the 
"old" species vanishes in the usual sense of the word.

Laurent Hodges

At 02:44 PM 10/12/2006, you wrote:

> "Wobbles in the Earth's orbit may explain the puzzling regularity with which
> new mammalian and other species appear and vanish in the fossil record,
> a study has found.

etc.