Earth Matters

Rescued rhino and hippo calves become BFFs

Should we limit visitors at national parks?

How a massive landslide created the landscape of Zion National Park

Lakomi the wolf loves her some belly rubs

To rebuild coral reefs quickly, just add electricity

7 monuments, cities and world treasures we could lose to rising sea levels

Canuck the crow likes to create havoc

Meerkats settle rivalries with eating contests

5 surprising facts about salamanders

World's largest sea sponge discovered in marine national monument

Tiny tuna crabs are invading the beaches of California's Monterey Bay

What is the faint young sun paradox?