[mysterio]

I thought that they found a whole layer of nanodiamonds and no skeletons of mammoths appeared above that layer. And that the ones that did appear in that layer showed signs of pitted tusks from debris.

That's what the history channel said, at least.

[dog breath]

The thing that interests me about extinctions is how they might actually be caused by a combination of events. Populations will survive environmental catastrophe several times only to disappear because the thin edge of survival gets tipped somehow. Sometimes what seems insignificant gets over looked in theories. For example lets say one little hunter has a rare talent for hunting mammoths, a rock slide blocks a critical mountain pass, or a virus hits at the same time as another environmental stress. How often are things happening even today clear cut and not influenced by multiple factors.

[SunkenCiv]

:’) Mammoths croaked off, here and there, throughout their time on the Earth, just like every other creature. What this “study” says is that the group involved is applying the local climate around a lake in Indiana to the entire continent (among other assumptions). As you said, there aren’t any mammoth kills in North America antedating the black mat, and there aren’t any Clovis artifacts that antedate it, either. Whatever and whoever made the Clovis artifacts were wiped out (or nearly so) by the same event.