Thinning Ozone Layer May Have Driven Greatest Extinction Event (4 of 10) (IMAGE)

American Association for the Advancement of Science (AAAS)

Thinning Ozone Layer May Have Driven Greatest Extinction Event (4 of 10)

Caption

Detail of resin being secreted by emerging shoot of irradiated pine and smothering a nearby dead seed cone as if the tree were callusing a wound. This material relates to a paper that appeared in the 07 Feb.2018, issue of Science Advances, published by AAAS. The paper, by J.P. Benca at University of California, Berkeley in Berkeley, Calif., and colleagues was titled, "UV-B-induced forest sterility: Implications of ozone shield failure in Earth's largest extinction."

Credit

[Credit: Jeff Benca]

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