Earth Matters

Mysterious stranding kills dozens of false killer whales

Ringling Bros. to shut down in May

Endangered West Coast oysters could thrive due to climate change

Obama's national monuments are a big deal

4 theories about how the moon formed

Watch the first video of the rare ruby sea dragon

10 things you didn't know about dormice

Woodland creatures build snowmen, toss snowballs in photographer's winter playground

Astronomers may have found a new way to detect alien planets

Why these camera trap photos of ocelot kittens are a big deal

Everybody likes a snow day (at the zoo)

Tracey and Jon Stewart's animal sanctuary gets final blessing