They couldn’t be that old. I thought it was around 20,000 years ago that our human ancestors were zapped by the alien monolith and had their brains turbo-charged. Bringing about the revolution in art and technology that finally distinguished them from the neanderthals. Before that, there wasn’t a dime’s worth of difference between neanderthal and human artifacts.
I remember when the Chauvet cave hit the news. The horse paintings were the most awesome.
There’s even better stuff that’s been lost.