Taken with the archaeological data, we can say that the old hypothesis of an invasion of people - not merely their language - from the steppe appears to be true.
Spencer WellsImagine you're copying a very long document, and occasionally you'll put an A where there should be a C. And that mistake has been translated down through the generations, and more mistakes have accumulated. So the longer the lineage has been in existence, the more mistakes the sequence is going to have.
Spencer WellsDNA ties us all together; we share ancestry with barracuda and bacteria and mushrooms, if you go far enough back.
Spencer Wells