Though some of the oldest surviving felines, cheetahs have the genetic diversity equivalent to identical twins.
How did animals respond to the ice age? Ancient bison preserved in the Canadian arctic have given scientists a clue.
Great white sharks have a reputation for being the fiercest in the sea. But are they now the ones in danger?
Scientists have found evidence that by the time modern humans arrived in Europe, Neanderthals had already experienced an extinction scare.
It was one of the Earth's momentous times. Continents collided. Volcanoes erupted. Ocean currents shifted. Species ran amok.
Scientists are using bone histology to sort things out. They've already concluded that Stygimoloch, was a juvenile Pachycephalosaurus, not a new species.
Global warming is a topic of political debate and scientific study these days. Is it happening? Scientists say the evidence is pointing in that direction.
How did some animals manage to survive the extinction?
Canadian researchers have found evidence that coal may have contributed to the disaster that killed off the dinosaurs.
History can explain why plants and animals look the way they do today.