> Other research has cast doubt on a link between Toba and a genetic bottleneck. For example, ancient stone tools in southern India were found above and below a thick layer of ash from the Toba eruption and were very similar across these layers, suggesting that the dust clouds from the eruption did not wipe out this local population.

At least it's an interesting thought. Or maybe it's just wistful thinking.

[1]https://whyevolutionistrue.wordpress.com/2011/09/18/how-big-...

I presume it was before homo sapiens, so maybe a million years ago if not more (sorry I don't have any factual details, but girl was super clever and she stated this as a well known fact in their research community).

all the racists of this world should get a bit of education to get perspective (wishful thinking...)

Mitochondrial DNA, not nuclear DNA. There may have been more ultimate female ancestors at the bottleneck, but only that number have had their mitochondrial DNA propagated.