LiveScience: Across the globe, reef-building corals live in symbiosis with algae, which provide the animals with food and their iconic brilliant color. But environmental stress high temperatures, in particular can kill corals by causing them to "bleach," a process in which they lose their vital algal friends and turn ghostly white. Scientists have long thought that faulty algal photosynthesis (the process that uses light to make food) ultimately triggers coral bleaching, but new research now shows that...