Mass Extinctions, Vol. 2: Killer Volcanoes and Supernova

Run Time - 28 min.  |  
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As this series continues to investigate the causes of mass extinctions in the early days of Earth, discussion centers around the impact of possible collisions with large objects from outer space, and movement of land masses and glaciers. Mass Extinctions, Vol. 2: Killer Volcanoes and Supernova offers commentary from scientists, who explain how an enormous supernova could have scorched the planet, killing entire species of animals. As debris blocked out the sun, ice ages may have occurred, and stepped-up volcanic activity would have unleashed toxic fumes into the air.