evidence: Some vegans claim that humans are herbivores, not omnivores, and that we are not physiologically designed to eat meat (see here: http://www.peta.org/living/food/natural-human-diet/). "According to biologists and anthropologists who study our anatomy and our evolutionary history, humans are herbivores who are not well suited to eating meat. Humans lack both the physical characteristics of carnivores and the instinct that drives them to kill animals and devour their raw carcasses. Although many humans choose to eat a wide variety of plant and animal foods, earning us the dubious title of "omnivore," we’re anatomically herbivorous." They go onto claim that we don't have tiger claws and teeth for catching and eating meat, that our jaws and teeth are designed for grinding plants not meat, that our stomach acid is too week to break down meat, that our intestinal tract is long like a herbivore for digesting plants and that it takes so long for meat to pass through that it rots and poisons us causing cancer, that we lack a hunting drive, that meat with it's cholesterol and protein is the cause of all disease so obviously its poison that we are not supposed to eat, that we get food poisoning from meat (like that never happens with vegetables...) and that the only reason humans started eating meat was to survive in times when there was a lack of plant foods available but according to our anatomy it's clear we're actually herbivores not designed for eating meat.