Earth

For Earth Day, we selected some of our favorite stories about environmentalism in the 21st century.

Tree cover loss in the tropics was outweighed by tree cover gain in subtropical, temperate, boreal, and polar regions.

Maybe 2768 A.U.C.

Emerging research suggests that methanogens might be able to withstand the temperature swings and low pressures of a Martian existence.

Most scientists oppose Russ George's efforts to fix the world's climate. But who's going to do something about it?

Scientists have used computer models to imagine a world where crops are specially bred to reflect away more light and heat, without compromising productivity.

It's not something we need to worry too much about, but....

For starters, let's stop calling it "Earth Day."

A round-up of research taken in the wake of the Bali summit on climate change finds little to warm the heart with the one exception that Atlantic hurricanes may grow more numerous but less fierce.