[Burkeman1]

More calories per kill and less expended per kill. Mammoth hunting was a way of life well documented from the Ukraine to central Russian to Siberia and then to the Americas and the extinction from each area follows the human path. Mammoths were dead in Siberia before they died out in the "new world". Bison are faster and offer less meat than a Mammoth. And in an age when you are lucky to live to 30- I think humans were far more attuned to what was easier to kill and what would offer them the most chance for survival. In fact- Mammoth mass hunt sites are older than bison mass hunt sites.