Wangari Maathai, who won the Nobel peace prize for her work planting trees, passed away. She was the first African woman to win the prize and the first Kenyan woman to earn a Ph.D.

Around the world, thousands of people met in more than 2,000 demonstrations to rally for a Moving Planet.

That massive NASA satellite managed to plop back to earth without killing anyone.

The North Dakota oil boom means that a spot to park a trailer runs $1,000 per month.

Grist thanks its sponsors. Become one.

Like a hydra, but slimier, an injured jellyfish spawned hundreds of clones of itself.