Our world has ended five times: it has been broiled, frozen, poison-gassed, smothered, and pelted by asteroids. What else could possibly happen? Journalist Peter Brannen has taken a close look at the five mass extinctions our planet has gone through. What exactly happened to cause extinction on such a massive, planet-wide level? How did any life make it past these events? Do these past extinction level events provide any clues to how it could happen again? If life was able to continue after these past events, does that provide any hope for humans should something catastrophic happen? Subscribe to our YouTube channel: http://well.org/subscribe Subscribe to The Urban Monk Podcast on iTunes: http://theurbanmonk.com/ Connect with us: http://well.org/ Facebook - http://well.org/facebook Twitter - http://well.org/twitter Pinterest - http://well.org/pinterest YouTube – https://www.youtube.com/user/wellchannel