who knows if it's real, but it always seemed silly to me that we were supposed to have invented almost all technology in the last few 10k years when we've had modern brain sizes for almost an order of magnitude longer than that.
Along with that 50k year old supposedly Neanderthal-crafted piece of string or that supposedly Denisovan-crafted jade bracelet, our entire extended family trees seems to have been pretty smart for a pretty long time.
I'm thinking some upper paleolithic to mesolithic technology must be much older than we think, but just doesn't preserve well.