PBS Eons has a new episode about the eruption of the supervolcano Toba.  About 74,000 years ago, ancient humans, in Africa, suffered an evolutionary bottleneck.  It seems Toba erupted at around the same time, was it the cause?  The research is not clear.

The Toba supervolcano was the biggest explosive eruption of the last 2.5 million years. And humans were around to see it, or at least feel its effects! But what were those effects?