When Humans Nearly Vanished

The Catastrophic Explosion of the Toba Volcano

The fascinating true story of the Toba supervolcano eruption and its impact on human evolution

By Donald R. Prothero Read by Qarie Marshall Nonfiction / Outdoors & Nature / Social Science English, Unabridged 6h 48m Sell Sheet Also available on
Format Release Date List Price Your Price ISBN
6 Audio CDs October 16, 2018 $49.99 $39.99 9781974923281 Add to Cart
1 MP3 CDs October 16, 2018 $29.99 $19.99 9781974923328 Add to Cart
							Some 73,000 years ago, the Mount Toba supervolcano in today's Indonesia erupted, releasing the energy of a million tons of explosives. So much ash and debris was injected into the stratosphere that it partially blocked the sun's radiation and caused global temperatures to drop for a decade. 

In this book, Donald R. Prothero presents the controversial argument that the Toba catastrophe nearly wiped out the human race, leaving only about a thousand to ten thousand breeding pairs of humans worldwide. Human genes today show evidence of a "genetic bottleneck," an effect seen when a population of organisms becomes so small that their genetic diversity is greatly reduced. This group of survivors could be the ancestors of all humans alive today. Prothero explores the geological and biological evidence supporting the Toba bottleneck theory, revealing how the explosion itself was discovered and offering insight into how the world changed afterward and what might happen if such an eruption occurred today.