Especially common in world mythologies are stories about world-ending floods and the chosen individuals that managed to survive them, like the biblical Noah and Utnapishtim, the ark builder in the Epic of Gilgamesh, a text thought to be even older than the Abrahamic religions. In Aztec mythology, a man named Tata and his wife Nena carve out a cypress tree after being warned of a coming deluge by the god Tezcatlipoca, while Manu, the first man in Hindu folklore, was visited by a fish that guided his boat to the peak of a mountain. The list goes on.This all begs the question: Why is there such astounding similarity between the oral traditions of geographically separated peoples?
Source: Why are flood myths in so many ancient stories? – Big Think
Could the prevalence of flood myths around the world tell us something about early human migration or even the way our brains work?