Neanderthals may not have been as primitive as we previously thought.

Researchers now believe the Stone Age dwellers had the ability to make the same sounds as modern Homo sapiens, a new study reveals. “Neanderthals could have produced all the sounds in that frequency range, like we can,” says lead author Rolf Quam. “There does not seem to be any difference in their ability to produce speech sounds. So they definitely could have said ‘hello’ or ‘ok’ if those utterances had any meaning for them.”

In recent years, scientists have also determined Neanderthals wore jewelry, created art and practiced a number of rituals — meaning they were far more intelligent than they were previously believed to be. It also casts more confusion over why the species died out while Homo Sapiens continued to thrive, researchers say.