Grand Canyon

(Newser) - The Grand Canyon might be three times older than previously thought, the Washington Post reports. A study in Science claims that a river—not the Colorado, but a smaller one—began carving the oldest part of the canyon 17 million years ago. It contends that the canyon-building greatly accelerated 5...

(Newser) - Government officials sent a flood of water surging through the Grand Canyon today in a bid to mimic Mother Nature and rebuild sandbars and other natural habitat for endangered fish. The deluge will continue for three days, increasing by about four or five times the usual flow from the Grand...

(Newser) - A plan to flood the Colorado River is a token move that leaves fish endangered, green advocates say. Federal officials retort that scientists will probe whether the controlled flood—the third so far—helps species threatened by the Glen Canyon Dam. But "doing one of these every five or...