A Russian nature reserve, Wrangel was the home of the last woolly mammoths to have walked the Earth. Mammoths inhabited the island until only 4000 years ago. In that time ancient Egyptians had ...

Cactus ferruginous pygmy owls are named for the saguaro cactuses they live in, their rusty-colored stripes, and their small size. They’re as fierce as they are small: These 2.5-ounce raptors prey on ...

The spring pygmy sunfish has been teetering on the brink of extinction for the 70-plus years it's been known to science. Existing only in one spring complex in the Tennessee River watershed in Alabama ...