The world's oceans were once steamier than a hot tub, scientists say—as hot as 158ºF (70ºC)—until a period of global cooling made advanced life on Earth possible.
The Amazon Basin, the world's largest river drainage system, used to flow in the opposite direction, a find that could pave the way to new oil and gas exploration, scientists say.
Wind is now the second largest source of new power generation in the U.S., utility industry experts say, and there are signs that the boom will continue.
The once rare sea lions of the U.S. Pacific Coast have rebounded in such numbers that they're now taking a big bite out of local fish populations, officials say.
A new "layer" on the popular desktop globe Google Earth uses United Nations satellite images to show the environmental damage wrought across the world over the span of a few decades.
Florida's manatees have rebounded from the brink of extinction, but experts say their survival depends on finding food and warm waters along the state's increasingly busy coast.
A new analysis of satellite data suggests that the Arctic island's ice sheet isn't melting as rapidly as other studies say, but is still losing 20 percent more mass each year than it builds back up during winter snows.
