Biologists have confirmed the existence of a 200-million-year-old species of egg-laying mammal that has been assumed to be extinct.

The African penguin could become extinct in 10 years but environmental groups are trying everything they can to save them.

The dodo bird thrived for millennia in Southeast Asia, then on Mauritius island where they had no natural predators and ...

In 1827, naturalist John Audubon announced a massive discovery: the largest North American eagle. But did the Washington sea ...