Scientists estimate half of the world's corals have been devastated as climate change has led to warmer oceans. When water temperatures get too high, corals become stressed and expel the algae that coats their tissues and provides the corals' primary food source. The corals gradually lose their color, known as bleaching, and many of them die. But surprisingly, there are corals in one sea in the Middle East that are resistance to the rising temperatures. VOAs Deborah Block explains why.