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The discovery of the world's largest coral is a story to make the heart sing. The news comes, of course, as we hear so many stories about the mass die-off of coral around the world - killed by our warming waters. And the man who found this coral -- completely by accident -- is Manu San Felix, a marine biologist and camera operator for National Geographic. He spoke to Newshour from aboard a boat off the Solomon Islands.

(picture: coral in the southwest Pacific Ocean; credit - Manu San Felix, National Geographic Pristine Seas)