From the articale? "An animal that was easier to kill may have been targeted more often, which could, along with changing climates, explain why animals such as the horse disappeared from the Arctic. A shot to the lung was lethal for early equines, Wood said, but a caribou could keep going."
Really? To you guys who have hunted caribou, where do you try to hit them. I'd think a double lung hit would do the job well enough.
I guess it's possible that the article doesn't accurately convey what the "study" actually found but what I read in the article seems more like wild conjecture than science based on sound method and measurement.
Was the choice between points really dependent on which objectively worked best or might it have been based partly on material availability and/or the skill to fashion the point?
I guess I'm really worried to hear that a lung hit won't stop a caribou. LOL