A panel of marine scientists said on Wednesday that in order to keep coral reefs from being eaten away by increasingly acidic oceans, humans need to limit the amount of climate-warming greenhouse gases in the atmosphere.

Harold Hudson has logged more time underwater than many fish. Most of those thousands of hours in diving gear have been at the world's reefs, conducting groundbreaking research.

By Cammy Clark, The Miami Herald May 14--KEY LARGO -- Harold Hudson has logged more time underwater than many fish. Most of those thousands of hours in diving gear have been at the world's reefs, conducting groundbreaking research.