Ancient Volcanic Eruption Destroyed the Ozone Layer

Ancient Volcanic Eruption Destroyed the Ozone Layer
AP Photo/Bogie Calupitan

A catastrophic drop in atmospheric ozone levels around the tropics is likely to have contributed to a bottleneck in the human population around 60 to 100,000 years ago, an international research team has suggested. The ozone loss, triggered by the eruption of the Toba supervolcano located in present-day Indonesia, might solve an evolutionary puzzle that scientists have been debating for decades.

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