The mass extinction has been definitively traced to coincidence with the comet strike of 10818 BCE.
Actual proof that each extinction was actually directly caused will be harder to come by. E.g. maybe dire wolves died because their prey went extinct. And, we still don't know why bison survived.
Actual proof that each extinction was actually directly caused will be harder to come by. E.g. maybe dire wolves died because their prey went extinct. And, we still don't know why bison survived.