EDITOR’S NOTE: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

Rare footage of ‘papping’, a crucial step in a koala joey’s migration from pouch to fending for itself, has been captured on film. The relatively undocumented practice involves a mother koala ...

In addition to producing breast milk, koala mothers produce a goopy, green poop that their joeys lap up. It may sound revolting, but scientists surmise that it’s nature’s way of making sure the next ...