As night fell across a mountain ravine in Ecuador, a “cryptic” creature with “blue” bones emerged from its hiding spot and perched on some plants. Its “leather”-patterned eyes scanned its surroundings ...

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 ...