if it is any consolation, there is a lot of data points you can gather from existing data that suggest that indeed ancient humans managed to get off this rock, and after the massive disruption of 12k-11k years ago, first a massive meteor strike, and then a near miss 1200 years later, creating the modern dry north africa and middle east (was a lush green subtropical land before) and then about 9000 years ago they were like

ok, we are going, but we will be back, according to our calculations in another 9k yeras you guys are basically screwed and we are going to use this opportunity to pick up the people who aren't psychos and let it burn baby burn

i want to believe this, because otherwise i spend the latter half of my life making stone axes and ... oh wait a minute

might not be so bad with the girls detached from their hormone drug supply so they can all be whores