Are Muskoxes in the U.S. Extinct?

If you put the extinctions in context, what you see is that all sorts of things are happening at the end of the plistocene. Massive range changes a mass if ecological changes. A lot of those species weren't around during the previous interglacialk we've been cycling through ice ages for the last two plus million years. Why did they only wait until ten thousand plus years ago to go extinct? And the answer is: well, some of them did disappear. We actually don't know that much about the previous inter glacial. In terms of what's going on now, there're no good data samples because it was demolished by the environnal system. So you