image: Normal seed cones at the end of growth season on healthy pine from control (non-irradiated) group. 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." view more
Credit: [Credit: Jeff Benca]