Earth Matters

Farmer discovers woolly mammoth near Detroit

Ginseng demand boosts prices and poaching

What makes a yawn contagious?

NASA's forecast for Earth: Mostly cloudy

The battle for the Salar de Uyuni

Say hello to Tofu, a red panda cub who is stealing hearts in Detroit

10 things you didn't know about hurricanes

Why NASA can't examine Martian water

Single photo shows the phases of rare supermoon lunar eclipse

Project leader behind dramatic Pluto mission scores book deal

Tracking British Columbia's secretive sea wolf

Sleepy meerkat can't keep his eyes open