From the standpoint of global warming, burning natural gas can be better than burning coal, a study published this week suggests.
This is a contentious issue among people who are opposed to the natural gas drilling practice known as fracking. That technique involves injecting water, sand and chemicals into wells to release far more gas than conventional drilling can. Opponents of fracking have been concerned not only about local environmental issues, but also about the potential for methane leaks to make global warming worse.
A 60-foot section of pipe is lowered into a trench during construction of the Gulf Coast Pipeline in Prague, Okla., in March. The Gulf Coast Pipeline, a 485-mile crude oil line, is part of the Keystone XL project and will run from Cushing, Okla. to Nederland, Texas. Although this southern stretch of the pipeline is nearly finished, the northern stretch is still under study.
Five years ago this week, a Canadian company proposed building a pipeline to send heavy crude oil from Alberta to U.S. refineries. Although the Obama administration's answer on the Keystone XL pipeline is not expected anytime soon, politicians in Washington and Canada are ramping up the pressure for the project, while environmentalists are pushing hard against it.
The surface tower at a drill site, under construction during blistering Antarctic winds. Data from instruments, deployed through 450 meters of ice, is transmitted from the tower by satellite back to the Naval Postgraduate School.
Scientists watching Antarctica's Pine Island Glacier from space have noticed with some alarm that it has been surging toward the sea.
If it were to melt entirely, global sea levels would rise by several feet.
The glacier is really, really remote. It's 1,800 miles from McMurdo, the U.S. base station in Antarctica, so just getting there is a challenge. Scientists have rarely been able to get out to the glacier to make direct measurements.
A still from news video of Darwin's great escape in December.
Credit ABC News
Darwin the 'Ikea monkey' will no longer be hitting the superstores with a Canadian woman who calls him her son after a judge in Ontario ruled that the primate is not a pet and should remain at an animal sanctuary.
As we wrote in December, Darwin, a Japanese macaque dressed in a heavy shearling coat, attracted considerable attention when he escaped from a locked crate in owner Yasmin Nakhuda's car in Toronto. He made his way through rows of parked cars and ended up inside a nearby Ikea store before staff there cornered him and called in animal control officials.
A Thai medic checks bodies for forensic identity in Phang Nga province in southern of Thailand on Jan. 11, 2005. Thousands of people were killed in Thailand after a massive tsunami struck on Dec. 26, 2004.
Human DNA is the ultimate fingerprint. A single hair can contain enough information to determine someone's identity — a feature that's been invaluable for identifying the unnamed casualties of natural disasters and war. But forensic scientists who use DNA say the technology isn't always available where it's most needed, like in poor countries, or in war zones like Syria.
A Global Hawk unmanned aircraft comes in for a landing at the Wallops Flight Facility in Wallops Island, Va., on Sept. 7, 2012, after studying Hurricane Leslie. The remotely controlled planes can stay in the air for as long as 28 hours and fly over hurricanes at altitudes of more than 60,000 feet.
For several weeks now, two unmanned spy planes have been flying over the Atlantic on an unusual mission: gathering intelligence about tropical storms and hurricanes.
The two Global Hawk drones are a central part of NASA's five-year HS3 (Hurricane and Severe Storm Sentinel) Mission investigating why certain weather patterns become hurricanes, and why some hurricanes grow into monster storms.
Gold exists, just as it really is, just as the physicist knows it to be, and that has <em>nothing</em> to do with us.
Credit Michal Cizek / AFP/Getty Images
Science is more like the United Nations than it is like a village. Different communities of scientists carry out their work using their own methods, languages and styles. Scientists in different fields need interpreters if they are to communicate with each other. There is no scientific lingua franca, not even mathematics.
Think about this: You wake up in New York City, decide to go for a stroll, head east after breakfast, and a short time later, still on foot, you find yourself in Morocco. Three hundred million years ago, you could have done that! There was no civilization back then, no cities, no countries, no people, but the land was there, so take a look at this map.
John Hernandez of Kailua, Hawaii, who owns John's Fresh Fish, is shown on Thursday. In the background at right is a container ship owned by Matson Navigation Co. A pipe maintained by the company cracked and caused the molasses spill.
Credit Eugene Tanner / AP
State officials in Hawaii say there's little they can do to clean up a 223,000-gallon molasses spill that has killed thousands of fish, as swimmers, surfers and snorkelers were being warned that the massive die-off could attract sharks.