Très intéressant cet article du Time qui dément la propagande selon laquelle la viande ne faisait pas partie de la diète de nos ancêtres:
As a new study in Nature makes clear, not only did processing and eating meat come naturally to humans, it’s entirely possible that without an early diet that included generous amounts of animal protein, we wouldn’t even have become human—at least not the modern, verbal, intelligent humans we are.
It was about 2.6 million years ago that meat first became a significant part of the pre-human diet (...) Prey that has been killed and then prepared either by slicing, pounding or flaking provides a much more calorie-rich meal with much less chewing than root foods do, boosting nutrient levels overall. (Cooking, which would have made things easier still, did not come into vogue until 500,000 years ago.)
(...) A brain is a very nutritionally demanding organ, and if you want to grow a big one, eating at least some meat will provide you far more calories with far less effort than a meatless menu will. What’s more, while animal muscle eaten straight from the carcass requires a lot of ripping and tearing—which demands big, sharp teeth and a powerful bite—once we learned to process our meat, we could do away with some of that, developing smaller teeth and a less pronounced and muscular jaw. This, in turn, may have led to other changes in the skull and neck, favoring a larger brain, better thermoregulation and more advanced speech organs.