Koala mothers have a unique way of feeding their babies. They provide a special substance called pap, which is a form of ...

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 ...

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 ...