I can't give you a citation but I'm under the impression that many scientists who are interested in megafauna extinction actual subscribe to a hybrid theory, na

I can't give you a citation but I'm under the impression that many scientists who are interested in megafauna extinction actual subscribe to a hybrid theory, namely that megafauna extinction was often the result of both human hunting and climate change happening at the same time, which could stress megafauna populations far more than just one or the other.