According to the Toba link, after the catastrophe, humans would have migrated out of Africa to repopulate the earth, so no death of all Africans there.
Since the Toba event 74kya and a probable North American boloid event about 13,000 years ago, decimated human and other populations and caused significant downturns in worldwide temperature, does anyone have a catastrophic event for the triggering of the last ice age about 125,000 years ago?