The top U.N. climate official said Saturday she is confident industrial countries will renew their pledges to cut greenhouse gas emissions after their current commitments expire next year.

Further commitments under the 1997 Kyoto Protocol, an unshakable demand by poor countries, would avert a feared derailment of U.N. negotiations, but would mark little advancement toward the goal of a rapid and steep drop in worldwide carbon emissions blamed for climate change.

Neurosurgeons may one day get help in operating rooms from a robot with movements 10 times steadier than the human hand to perform delicate brain surgeries, the EU said Monday.

The European Commission touted the EU-funded ROBOCAST project as a breakthrough in robotic neurosurgery that could in future help treat tumors, epilepsy, Parkinson's disease and Tourette syndrome.

A rover of "monster truck" proportions zoomed toward Mars on an 8½-month, 354 million-mile journey Saturday, the biggest, best equipped robot ever sent to explore another planet.

NASA's six-wheeled, one-armed wonder, Curiosity, will reach Mars next summer and use its jackhammer drill, rock-zapping laser machine and other devices to search for evidence that Earth's next-door neighbor might once have been home to the teeniest forms of life.

Australian archaeologists have uncovered evidence that prehistoric humans living 42,000 years ago mastered the art of deep-sea fishing, they revealed Friday.

They also found the world's earliest recorded fish hook, made of shell and dating from between 23,000 and 16,000 years ago, during excavations at the Jerimalai cave site in East Timor.

A heavy equipment operator unearthed what appears to be a nearly complete plesiosaur while digging in Canada's oil sands, Syncrude announced Thursday.

The fossil was discovered on November 14 and is now being examined by Royal Tyrrell Museum of Palaeontology scientists who aim to have it removed by the end of the week, the company said in a statement.

China placed two satellites in orbit on Sunday, including a spacecraft that will collect and relay data for disaster relief efforts, state press reported.

The two satellites were successfully launched aboard a Long March carrier rocket, China's main space launch vehicle, from northwest China's Jiuquan satellite launch centre, Xinhua news agency said.

Most of the radioactive fallout from the disaster at the Fukushima nuclear plant dropped into the ocean and began circling the planet, Japanese researchers said Thursday.

Up to 80 percent of the cesium released by the Fukushima Daiichi power plant landed in the Pacific and made its way into other oceans around the world, scientists at the Meteorological Research Institute said.

For more than half a century, geologists have wrangled over the origins of an astonishing range of mountains found beneath ice up to three kilometers (two miles) thick in East Antarctica.

Named after the Soviet geophysicist who detected them in 1958 during the first International Polar Year exploration, the Gamburtsev mountains are 1,200 kilometers (750 miles) long, with jagged peaks up to 2,700 meters (8,900 feet) high intersected by deep troughs and valleys.

France's nuclear watchdog on Tuesday said it had detected traces of radioactive iodine in the air last week after similarly low contamination was reported by the Czech Republic, Poland, Slovakia and Austria.

Concentrations of iodine 131 measuring a few microbecquerels per cubic meter were detected last week at four monitoring stations in northern and eastern France, the Institute for Radiological Protection and Nuclear Safety (IRSN) said.

Scientists are beginning to decode the complex biology of aging and are optimistic that recent advances in research may lead to treatments that can slow or even reverse degeneration and disease.

"We are seeing a major change, very important developments and real therapeutic efforts to try to treat age-related illnesses," said Norman Sharpless, professor of medicine and genetics at the University of North Carolina.