Earth Matters

What is a blue moon?

What we're learning about Ultima Thule

How does a sloth say 'Thank you'?

Millions of people inhabit this 'hidden continent' that's 94% underwater

Photos capture diversity of life on Earth while inspiring conservation

10 things you didn't know about koalas

The story behind kudzu, the vine that's still eating the South

4 things that make the humble squid the supergenius of the sea

The secret to staying safe while hiking is preparation

Get face to face with wild African lions

New panda park in China will be much bigger than Yellowstone

5 things you didn't know about the weirdly majestic basking shark