Paleobiologist Christine Hertler says the loss of thick hair made extended periods of exertion possible in our ancestors. Effort generates heat, and sweating dissipates it. But for that to work, the skin has to be free of too much hair.
Animals that grow a white coat in winter are at risk from predators as summers lengthen and snow cover retreats. But they could evolve faster than you might expect, according to a new study.
The camel's hump is perhaps its defining feature. It's not just an anatomical oddity but a brilliant bit of evolution.
Surviving under harsh conditions is one thing. Growing for 1,500 years, building dunes and producing melons is quite another. Meet two plants that have perfected life in the desert.
A new species of frizzy-haired orangutans has been discovered in the remote jungles of Indonesia. With a population of only 800, the newly named Tapanuli orangutan is now the world's most endangered great ape.
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