Where did you get that figure from? Humans are much older than 40,000 years.
According to Asimov’s Chronology of the World, modern man has existed for 40 to 50 thousand years. He used the phrase “same hardware, different software.”
Asimov’s book is amazing reading for the ancient times. In modern times, he reveals his socialist leanings and it colors his history. It’s really weird. The first half of his book, his commentary rings true, but the second half is distasteful because he put’s on his socialist glasses and interprets history with a different philosophy.
His older ancient history books are all great. I wonder when, where, and why his analysis of history flips...