"There is a word for what Darwin and the rest of us have felt when in the presence of the reef: ?awe.? Confronted with the reef, awe is the most appropriate response. It is probably in our nature. It is also, apparently, in our nature to destroy that which we hold in awe." —from The Enchanted Braid Of the myriad ecosystems populating the underwater world, coral reefs are by far the most complex. While their stunning beauty has been extolled for centuries, the intricate workings of reef environments remained largely hidden from view. In fact, until the advent of scuba diving just fifty years ago, corals have been among the last natural histories to be extensively explored. The high passion with which scientists have greeted this particular investigation —beginning with the foundational theories of Charles Darwin in 1842—is perhaps unprecedented, but hardly difficult to understand. A phenomenon of both awesome beauty and vital importance, the coral reef is home to...