[nitzy]

The researchers suggest that these hardy hunter-gatherer genes may date back to the last lce Age

Every single gene in every single cell of every single person "dates back to the last Ice Age".

Does the author think some genes were brought to earth by aliens 8,000 years ago and thus would not "date back to the last Ice Age"?

[SunkenCiv]

No, that idea is restricted to Ted Holden.