Earth Matters

What is 'Planet Nine'?

Hairy Houdinis: 12 animal escape artists

Why are these endangered frogs dying mysteriously in Peru?

Just get in the burrow! Raccoon mom struggles with little ones

13 glittering, record-setting gems to ogle

Hybrid of extinct aurochs and ice age bison discovered in cave paintings

The story of modern orangutans in 6 arresting photographs

At Glacier Bay, witness a national park emerge from an ice age

Predator-proof fence saves seabirds in Hawaii

It's a girl! Iowa zoo has a new baby black rhino

Tasmanian devil milk may hold key to killing superbugs

​How a caustic lake in Tanzania became a flamingo paradise