China counts down to Thursday space launch

JIUQUAN, China (Reuters) - China will send its third manned mission into space on Thursday evening on a mission which will include its first space walk, the government said on Wednesday. The Shenzhou VII will lift off from the Jiuquan space center in a remote desert area of the northwestern province of Gansu between 9:07 p.m. (9:07 a.m. EDT) and 10:27 p.m. (10:27 a.m. EDT), mission spokesman Wang Zhaoyao told a news conference.

Scientists find sun less blustery than before

LOS ANGELES (Reuters) - The sun's winds are less blustery than they used to be, NASA said on Tuesday, revealing data from a solar probe that promises new insights about Earth's local star but poses few if any consequences for humans -- unless you're an astronaut. The data show the solar wind, a steady stream of charged sub-atomic particles emitted by the sun and blowing at 1 million mph (1.6 million kph), has dwindled to its lowest level in at least 50 years, reducing its strength as a shield against potentially harmful galactic cosmic radiation.

Researcher finds tiny dino in world of giants

CALGARY, Alberta (Reuters) - A Canadian researcher has discovered what is believed to be North America's smallest dinosaur, a 70-million-year-old chicken-sized beast that was also unusual for its diet of insects. Called the Albertonykus borealis, the odd-looking creature had bird-like features including slender legs, jaws like pincers and stubby arms with big claws.

"Big Bang" collider to restart in spring 2009

GENEVA (Reuters) - The huge particle collider built to simulate the conditions of the "Big Bang" will not restart until spring 2009 after a weekend technical glitch, the European Organization for Nuclear Research (CERN) said Tuesday. A helium leak into the tunnel housing the biggest and most complex machine ever made forced CERN to shut down its Large Hadron Collider (LHC) Saturday, just 10 days after starting it up.

Wine ingredient protects against radiation: report

WASHINGTON (Reuters) - A natural antioxidant commonly found in red wine and fruit may protect against radiation exposure, U.S. researchers reported on Tuesday. Tests in mice showed that resveratrol, when altered using a compound called acetyl, could prevent some of the damage caused by radiation, the researchers told the American Society for Therapeutic Radiology and Oncology meeting in Boston.

Saturn's rings may be older than thought

LONDON (Reuters) - Saturn's rings may be more massive and older than previously thought, researchers said on Tuesday. Findings to be presented at the European Planetary Science Congress in Germany bolster the possibility that the rings were formed billions of years ago.

Little Mars rover that could heads to new crater

LOS ANGELES (Reuters) - The aging but intrepid Mars rover Opportunity is set to embark on a two-year mission it may never complete -- a 7-mile (12-km) journey to a crater far bigger than one it has called home for two years, NASA said on Monday. The golf-cart-sized robot with a wobbly front wheel climbed out of Victoria crater earlier this month and scientists at NASA's Jet Propulsion Laboratory in California are steering the probe toward a crater more than 20 times larger, dubbed Endeavor.

"Chemical equator" divides hemispheres: scientists

SINGAPORE (Reuters) - Scientists have discovered a "chemical Equator" that divides the polluted air of the Northern Hemisphere from the largely uncontaminated atmosphere of the Southern Hemisphere. Researchers from Britain's University of York found evidence for an atmospheric chemical line about 50 kilometers (30 miles) wide in cloudless skies in the Western Pacific, with levels of carbon monoxide four times higher on the northern side.

Stem cells open door for studying human disease

MADISON, Wisconsin (Reuters) - Advances in stem cell research offer a new way of studying human disease, allowing scientists to move beyond fruit flies and lab mice to see how human cells go awry and how drugs and other therapies might help, U. S. researchers said on Monday. They said human embryonic stem cells and a newly invented type of cell called induced pluripotent stem cells or iPS cells -- made without the use of human embryos -- are helping to transform how researchers develop and test therapies.

Researchers hope for change on stem cell politics

MADISON, Wisconsin (Reuters) - Stem cell experts said on Monday they hope the next U.S. president will end political curbs on embryonic stem cell research but some worry recent comments by Republican candidate John McCain suggest his past support for such research may be waning. Both McCain and Democrat Barack Obama have said they favor easing restrictions on spending public money to finance embryonic stem cell research.

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