Strange Ritual Behaviour in Chimps Caught on Hidden Cameras. Is this the origin of religion?
New footage shows chimpanzees engaging in bizarre behaviour — which might be a form of sacred ritual that could show the beginnings of a kind of religious belief. Chimpanzees in West Africa have been spotted banging and throwing rocks against trees and throwing them into gaps inside, leading to piles of rocks. Those rocks do not appear to be for any functional purpose — and might be an example of an early version of ritual behaviour.