[VadeRetro]

Ping for a new Permian-Triassic extinction thread!

[PatrickHenry]

Ping for the 2nd half of my list (Vade got the others).

[This ping list is for the evolution -- not creationism -- side of evolution threads, and sometimes for other science topics. To be added (or dropped), let me know via freepmail.]

[js1138]

PT placemarker. This theory was discussed at length on one of the cable channels about a week ago. It will probably be rerun many times.

Among the virtues of the theory is its explanation of the relative slowness of the extinction -- spanning 100,000 years or more -- too long a period to be explained by an asteroid impact. It also explains why the extinction involved the oceans as well as the land.