Around 74,000 years ago, a massive caldera erupted on the Indonesian island of Sumatra, triggering a prolonged and devastating volcanic winter. Scientists have speculated that the Toba eruption pruned back human populations to a considerable degree, but new research published today suggests at least one group of humans living in southern Africa not only managed to survive the event - they actually prospered. The Toba eruption, as we're learning, wasn't nearly as bad for humans as we thought - and it may not have produced a volcanic winter at all.