What effect did a catastrophic drought in East Africa have on Homo Sapiens thousands of years ago?

"In Brief. Sometime between 195,000 and 123,000 years ago, African Homo sapiens populations plummeted, thanks to cold, dry climate conditions that left much of the land uninhabitable. Everyone alive today is descended from people from a single region who survived this catastrophe."

Explanation:

i got it off google..hope it helps you.

answer; i believe the best and correct answer is stronger bonds between the nations of africa;

answer; no longer than a reasonable period of time;