Mother Nature Network: Sea levels are rising and tropical cyclones are intensifying, which is bad news for about 200 million people who live along Earth's coasts. If only evolution had spent millions of years fine-tuning some kind of sea creature to build and maintain giant barriers that can soften the ocean's fury for us. It did: corals. The reefs these animals build are well-known to scientists and surfers for absorbing the blow of incoming waves and creating big, dramatic breaks. But now, thanks to a new study, we...