Thank you. I don’t know how much you’ve read concerning the most recent extinction event(End Pleistocene) but there are any number of explanations for many of the anomalies relating to that period. As far as I know the only mammoth/mastodon found with buttercups or whatever in their mouths and/or stomachs were in Siberia which reportedly wasn’t covered with an ice sheet during the last glaciation. Fact is, evidence seems to indicate the climate was much milder then; maybe even sub-tropical. Go figger...