The early four-legged animals, the tetrapods, were the forebears of today’s mammals, birds, reptiles, and amphibians.
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Scientists uncovered transparent creatures with "glittering" hair and a crustacean that lives inside the see-through body of another sea dweller.
The constant noise of traffic is so ubiquitous, it is barely noticeable to our ears – until we step into a roadless forest and experience true quiet.
Researchers analyzed permafrost samples collected from ground squirrel burrows, spanning several glacial periods.
Scientists say the buffalo-like species grew up to weigh up to half a ton.
The cave lion had a history of interbreeding with modern lions that was tightly linked to past climatic changes.
Up to two-thirds of species are changing their behavioral patterns in response to seeing people in their natural environment.
They are retreating into smaller areas of ocean and traveling further to find new places to live as Earth's climate rapidly changes.
Scientists say technology could help dismantle lucrative poaching networks.
Scientists named it Attenboroughnculus tau as a birthday present for TV naturalist who turns 100 on Friday, May 8.