Ocean heat shatters record with warming equal to 5 atomic bombs exploding "every second" for a year. Researchers say it's "getting worse."
During World War II, the U.S. dropped an atomic bomb over Hiroshima, Japan, wiping out 90% of the city. Last year, researchers say, the ocean heated up an amount equal to the energy of five of those bombs detonating underwater "every second for 24 hours a day for the entire year."
