One night in November each year, hundreds of species of coral spawn. Scientists have puzzled over how coral living over a thousand miles apart on the Great Barrier Reef know when to do the deed. A new study published in the journal Science
may explain why.
Photos courtesy of Jez Roff, Ove Hoegh-Guldberg, University of Queensland. Thanks to Lior Appelbaum. Produced by Flora Lichtman