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.
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....
A Miller-McCune Research Essay by Columbia University professor Shahid Naeem on the importance of biodiversity and the true significance of the human species.
A European satellite scheduled to launch today will provide hard data on rising seas.
Planet hunter Geoff Marcy scans the skies for answers to the universal question of other life.
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.