Re: Milankovich Cycles

[J.Young@xxxxxxxxx (Jeremy Young)]

Norm MacLeod wrote
>Of course clade membership per se has no bearing whatsoever on extinction
>suseptibility (though that membership usually carries with it a large
>amount of morphological, ecological, behavioral, etc. information that does
>bear in the question of extinction suseptibility).  Nevertheless,
>statements such as "the dinosaurs went extinct at the K-T boundary" imply
>that neither the dinosaurs nor any of their direct descendents are to be
>found in Tertiary sediments.  This is simply false.

Birds are not direct descendants of Maastrichtian dinosaurs.