"A study published March 7 in Nature presents genetic evidence that humans left Africa in at least three waves of migration. It suggests that modern humans (Homo sapiens) interbred with archaic humans (Homo erectus and Neandertals) who had migrated earlier from Africa, rather than displacing them.", reports National Geographic.

Previous theories generally stated that the superior strains of human wiped out the lesser ones.

"There are regions of the world, like the Middle East and Portugal, where some fossils look as if they could have been some kind of mix between archaic and modern people," said Rebecca Cann, a geneticist at the University of Hawaii.

This supports my idea that with each global cataclysm, species split into sub-species, which re-combine in the long term. Current humans are a combination of neanderthals, angels, giants, watchers, Atlanteans, gods, nephilim and whatever other nicknames our earlier sub-species had.