Evolution on islands has produced myriads of wondrous plants and animals. Some of these creations can be rather odd in appearance, however. Think of the dodo, a flightless pigeon discovered in the 16th Century on the island of Mauritius. Without predators, the dodo evolved -- or devolved -- until it lost its wings, grew pudgy, and waddled about with no fear. It is now long gone and has become a poster-child for extinction. The dodo couldn't survive in the face of invasive predators like ...