Article: Humans responsible for demise of gigantic ancient mammals

Scientists claim their research settles a prolonged debate over whether mankind or climate change was the dominant cause of the demise of massive creatures in the time of the sabretooth tiger, the woolly mammoth, the woolly rhino and the giant armadillo. 

Humans arrive, and megafauna went extinct. The authors had no way of determining if the extinctions due to hunting, competition, or habitat change.

Examining different regions of the world across these scenarios, they found coincidences of human spread and species extinction which illustrate that man was the main agent causing the demise, with climate change exacerbating the number of extinctions. However, in certain regions of the world -- mainly in Asia -- they found patterns which patterns were broadly unaccounted for by either of these two drivers, and called for renewed focus on these neglected areas for further study.