Finches add cigarette butts to their nests to ward off pests

Yellowstone grizzlies to be removed from Endangered Species List

The real reason why eggs come in so many shapes and sizes may be childishly simple

Why doesn't anyone want to play with this baby elephant?

Meet the cecropia moth, the largest moth in North America

Zola the gorilla dances like he's never danced before

Ocean pollution is no laughing matter

Killer whales are hunting fishing boats like prey

Quick-thinking elephants save the day

How I saved a baby screech owl

Glass eels use an inner compass to navigate the tides

A glowing invasion of 'fire bodies' is underway in the Pacific