The modern humans "replaced" the archaic humans, which is a nice way of saying they drove them into extinction.
Their discovery means that archaic humans, who left Africa 1.5 million years earlier than modern people, survived far longer into recent times than was previously supposed.
The analysis suggested that this reflected the worldwide expansion of modern humans as a new species, replacing rather than mixing with local archaic humans.
Modern human sites older than this have a more primitive set of stone implements, similar to those used by archaic humans like the Neanderthals.
The data suggests that modern and archaic humans interbred in Asia before the migration to Australia.
Extinct Homo species are known as archaic humans.
The emergence of archaic humans is sometimes used as an example of punctuated equilibrium.
Robin Dunbar has argued that archaic humans were the first to use language.
He largely bases his doubts on the fossil record of archaic humans and their stone tool kit.
What the study didn't touch on was why DNA sequences from archaic humans is still around.