Multiple major coral reefs around the world are getting paler due to warming sea temperatures in the fourth-ever global bleaching event, and satellites are keeping tabs on the carnage.
The grim event, the second in a decade, is affecting over half the world's coral area across the Pacific, Indian and Atlantic oceans. The toll includes what could be the worst bleaching ever experienced by Australia's famous Great Barrier Reef, according to the U.S. National Oceanic and Atmospheric Administration and the International Coral Reef Initiative, which confirmed the bleaching event on Monday (April 11).
