"ancient humans" is correct and usable in written English.
You can use it to refer to humans from the distant past, e.g. "Some ancient humans used tools made of stone."
"Ancient humans exploited the fact that humans are good runners in the heat," Dr. Bramble said.
If you want to know where ancient humans were, follow their food.
The fossils belong to ancient humans with some characteristics similar to other species.
Archaeologists learn about ancient humans by excavating and analyzing historical artifacts.
The idea is that various hardships might have occasionally left ancient humans a pint short.
A chapter on the paleoanthropologist John Shea, whose work focusses on the tools used by ancient humans, was especially moving.
Archaeologists are usually pretty good at distinguishing between the bones of ancient humans and those of other animals.
Fossils of tiny ancient humans, found on the island of Flores, have provoked much debate and speculation.
The find supports the growing consensus that prehistoric hanky-panky was not uncommon between Neanderthals and ancient humans.
They said earlier evidence had suggested these particular ancient humans had domesticated dogs before they began keeping cattle.
Researchers could feasibly begin searching for bones in caves where DNA in the dirt indicates habitation by ancient humans.
