A properly dressed male guppy, with its gaudy blue spots and brilliant splashes of orange, can't help but stand out. But for a fish that spends its life swimming among predators, it seems that ...

In the arid mountains of northern Oman, rocky caves hold pools of water. Naturalists were exploring these subterranean lakes in the Al-Hoota cave in 1980 when they discovered a white, eyeless fish. It ...