The cave bear started to become extinct in Europe 24,000 years ago, but until now the cause was unknown. An international team of scientists has analysed mitochondrial DNA sequences from 17 new fossil samples, and compared these with the modern brown bear. The results show that the decline of the cave bear started 50,000 years ago, and was caused more by human expansion than by climate change.On the other hand, another new study -- this one from the field of paleobotany -- provides evidence for the Climate Change Hypothesis of Pleistocene Extinction.
I still back the Overkill Hypothesis, because I think the bulk of the evidence supports it. But, I am not immune to confirmation bias, so I provide you, dear reader, with evidence from both camps.