Not dumb. Yes, they did know of it. But they did not get opportunity to study it. So now they have to hustle before it goes under again. They had to do Abu Hur

Not dumb. Yes, they did know of it. But they did not get opportunity to study it. So now they have to hustle before it goes under again. They had to do Abu Hureyra in a mad rush before it went under. That was a site occupied at the time the bolide strike in 10,818 BCE itinitiated the 1300-year Younger Dryas freeze, and burnt it to cinders and glass beads.