Which Race is Older?

And what language would a feral child speak?

A method to test, per Herodotus, (the Father of "History") -

actually, via Herodotus, per the ancient Egyptians.

Now the Egyptians, before the reign of their king Psammetichus, believed themselves to be the most ancient of mankind. Since Psammetichus, however, made an attempt to discover who were actually the primitive race, they have been of opinion that while they surpass all other nations, the Phrygians surpass them in antiquity. This king, finding it impossible to make out by dint of inquiry what men were the most ancient, contrived the following method of discovery:-

He took two children of the common sort, and gave them over to a herdsman to bring up at his folds, strictly charging him to let no one utter a word in their presence, but to keep them in a sequestered cottage, and from time to time introduce goats to their apartment, see that they got their fill of milk, and in all other respects look after them.

So after two years, the herdsman opens the door, and one of the kids goes "Becos!", which apparently sounds a lot like the Phrygian word for bread (this connection was made by pharaoh Psammetichus himself).

So the Phrygians are older, is what they figured.

Great page, by the way.