Imagine that there are 20 or so gigantic time bombs around the world, each one with the destructive power of thousands of nuclear bombs. When one of them goes off, the whole planet will be affected. These are supervolcanoes, and “The Doomsday Book” by Marshall Brain covers them in detail. In the worst-case scenario, the ejecta from the volcano causes years-long winter weather that leads to crop failure and starvation for people around the globe. These videos help you learn more about the supervolcano threat humanity faces:

Super Volcanoes
The Power of Volcanoes : Years without Summer
Earth’s most destructive supervolcanoes
This Super Volcano Has Scientists Freaking Out
Supervolcanoes 101
7 supervolcanoes that threaten humanity
Why the Yellowstone supervolcano could be huge
NASA’s $3.5 billion idea to save Earth from a supervolcano
Volcano eruption power comparison

The Doomsday Book” by Marshall Brain lays out this scenario in amazing detail and offers solutions to prevent this doomsday scenario from unfolding. You can order the book today on Amazon and other retailers.