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Re: Selective Extinction

Peter Von Sholly wrote:
> An old and often asked question about the final dinosaur extinction is why
> certain animals went and others didn't.  I read somewhere recently about an
> impact theory wherein a wave of hot gasses swept across the land destroying
> most everything in its path.     
  It has been suggested before that a radio-active cloud could have
been the cause of the extiction of large anamals; large animals will
suffer greater damage from gamma or other hard radio-active exposure
and to the reasons you stated (close to the ground, or in a burrow
out of the line of direct exposure). this is a pet project of mine
and its very intriguing. any input to me would be very welcome.
                                      Have a good day.
                                      Earl Wood