The Toba eruption has been linked to a genetic bottleneck in human evolution about 70,000 years ago,[REF][REF] which may have resulted from a severe reduction in the size of the total human population due to the effects of the eruption on the global climate [REF].
According to the genetic bottleneck theory, between 50,000 and 100,000 years ago, human populations sharply decreased to 3,000-10,000 surviving individuals [REF].