> Humans are capable of taking nutrition from plants or animals. Well yes but no. Large brains were largely made possible by the fact we mastered fire (mostly

> Humans are capable of taking nutrition from plants or animals. Well yes but no. Large brains were largely made possible by the fact we mastered fire (mostly to cook meat). Look at gorillas, they eat plants and spend most of their waking life to forage for food. Having even larger brains means that foraging would be impossible to sustain a modern human's constitution.