Ozone depletion may have caused Earth's largest mass extinction
Channel: UC Berkeley
Date: 2018-02-07

UC Berkeley graduate student Jeffrey Benca demonstrates the experiment showing how pine trees became temporarily sterile when exposed to intense UV radiation, supporting the theory that ozone depletion may have caused the Earth's largest mass extinction (the Permian Extinction).

For the full story, visit: http://news.berkeley.edu/2018/02/07/increased-uv-from-ozone-depletion-sterilizes-trees/

Video by Roxanne Makasdjian and Stephen McNally

Music: 
"Cylinder Seven" and "Stories About the World That Once Was" by Chris Zabriskie is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Source: http://chriszabriskie.com/cylinders/
Artist: http://chriszabriskie.com/

"Their Story, Them Seeing" by Puddle of Infinity

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