Plans to use an array of powerful air cannons in an undersea seismic study near a Central California nuclear power plant have federal and state officials juggling concerns over marine life with public safety.

Pacific Gas & Electric Co. wants to use big air guns to emit strong sound waves into a large, near-shore area that includes parts of marine reserves to make three-dimensional maps of fault zones, some of which were discovered in 2008, near its Diablo Canyon nuclear power plant.

A Chinese rocket on Saturday successfully launched a Venezuelan earth-observation satellite into orbit, state media said.

The satellite, dubbed "Generalissimo Francisco de Miranda" after the major Venezuelan independence figure, was launched from the northwest Jiuquan base in the Gobi desert using a 'Long March' class rocket, said Xinhua.

An Alaska scientist whose observations of drowned polar bears helped galvanize the global warming movement has been reprimanded for improper release of government documents.

An Interior Department official said emails released by Charles Monnett were cited by a federal appeals court in decisions to vacate approval by the Bureau of Ocean Energy Management of an oil and gas company's Arctic exploration plan.

They slink through the woods in camouflage and face paint, armed with tire irons, screwdrivers and hoes. They're the new breed of U.S. ginseng diggers, hoping to feed rising Asian demand for the increasingly rare — and expensive — plant's roots.

Police say more diggers are pushing into the back country in search of wild ginseng, ripping up even the smallest plants and ignoring property lines.

The countdown is on for skydiver Felix Baumgartner.

In just two weeks, Baumgartner will attempt to go supersonic when he jumps from a record altitude of 23 miles over New Mexico. Project managers announced Tuesday the feat will take place Oct. 8.

Australian officials, under pressure to protect beach-goers after a string of deadly shark attacks, have approved a plan to kill sharks that venture too close to people in the water.

The plan, which was announced by Western Australia state Premier Colin Barnett on Thursday, has infuriated conservationists and marks a sharp reversal of the current policy that permits the killing of sharks only after they have attacked.

India's leopard population is at risk of being decimated as a result of rampant poaching fuelled by a thriving black market for its skins, a study by animal conservationists said on Friday.

The report by a network of wildlife groups known as TRAFFIC said at least four leopards have been killed every week by poachers in India in the last decade, and their plight mirrored that of the tiger, which is now an endangered species.

NASA's Mars rover has discovered gravel once carried by the waters of an ancient stream that "ran vigorously" through the area, the U.S. space agency said Thursday.

Scientists had previously found other evidence of the one-time presence of water on the Red Planet, but this is the first time stream bed gravel has been discovered.

A Chinese icebreaker docked Thursday at Shanghai after becoming the first Chinese vessel to cross the Arctic Ocean, a landmark trip that is part of Beijing's efforts to expand its presence in the Arctic.

With melting icecaps accelerating the opening of new shipping routes and the exploration of oil, gas and mineral deposits in the Arctic, China has been eager to gain a foothold in the region.

The International Space Station may have to move to avoid some space junk.

NASA said debris from an old Russian satellite and a fragment from an Indian rocket could come too close to the station on Thursday. The station would be moved Thursday morning if necessary, NASA said Wednesday.