We have seen active volcanoes over the years in countries like Japan and Iceland.  However, there have been eruptions in the past that are absolutely mindboggling.  Here is a description:

They are eruptions so vast, so Earth-shattering, they have changed the history of our planet. Climate collapse. Toxic turmoil. Mass extinction. Worse than a killer asteroid, or nuclear war, they are Earth’s most destructive Supervolcanoes.

Let’s check out some of these supervolcanoes in the video on page 2

Next Page »