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WASHINGTON, Aug. 17 (Xinhua) -- Latest research shows that the Moon could be younger than previous estimates. The findings were published online Wednesday in the Nature journal.The prevailing theory of the Moon's origin is that it was created by a giant impact between a large planet-like object and the proto-Earth. The energy of this impact was sufficiently high that the Moon formed from melted material that was ejected into space. As the Moon cooled, this magma solidified into different mineral components. Analysis of lunar rock samples thought to have been derived from the original magma has given scientists a new estimate of the Moon's age.According to this theory for lunar formation, a rock type called ferroan anorthosite, or FAN, is the oldest of the Moon's crustal rocks, but scientists have had difficulty dating FAN samples. The research team used newly refined techniques to determine the age of a sample of FAN from the lunar rock that was brought back to Earth by the Apollo 16 mission in 1972.The team analyzed the isotopes of the elements lead and neodymium to place the FAN sample's age at 4.36 billion years. This figure is significantly younger than earlier estimates of the Moon's age that range as old as the age of the solar system at 4. 568 billion years. The new, younger age obtained for the oldest lunar crust is similar to ages obtained for the oldest terrestrial minerals -- zircons from western Australia -- suggesting that the oldest crusts on both Earth and Moon formed at approximately the same time, and that this time dates from shortly after the giant impact.This study is the first in which a single sample of FAN yielded consistent ages from multiple isotope dating techniques. This result strongly suggests that these ages pinpoint the time at which the sample crystallized."The extraordinarily young age of this lunar sample either means that the Moon solidified significantly later than previous estimates, or that we need to change our entire understanding of the Moon's geochemical history," Carnegie Institute of Science's geochemist and study author Richard Carlson said.

BEIJING, Sept. 1 (Xinhua) -- Medicine prices at public clinics have been notably reduced thanks to a policy that promotes basic medicine, an office of the State Council said Thursday.Current price levels of basic medicine used by government-funded township hospitals and community clinics have been reduced an average of 25 percent from the levels two years ago when the policy started, according to a statement from the State Council office in charge of reforming the country's healthcare program.China has introduced a state list of basic medicine used by government-funded township hospitals and community clinics, which includes roughly 300 types of commonly-used Western and traditional Chinese medicine.Provincial governments will purchase basic medicine through public bidding and distribute them to local clinics.These clinics must not raise the prices of listed medicine and in return, the government will provide them with subsidies.The policy has been implemented at all township and community clinics in all the 31 provinces, municipalities and autonomous regions in the Chinese mainland, the statement said. 

YUEYANG, Hunan, June 2 (Xinhua) -- The population of finless porpoises, an endangered species of freshwater dolphin that lives in China's Yangtze River, may decrease by over 80 percent over the next 30 years, experts said on Thursday after conducting a field survey along the river.The rare species will edge closer to extinction if no action is taken, said Wang Ding, a dolphin expert from the Hydrobiology Institute of the Chinese Academy of Sciences.Wang's team conducted a survey on Poyang Lake, Dongting Lake and other locations along the Yangtze from Sunday to Wednesday this week.The dolphin population currently stands at 1,000, even lower than that of the giant panda, Wang said.The dolphin population is decreasing by a rate of 6.4 percent annually, Wang said."The next ten years will be a critical period for the conservation of this species," Wang said.A long-lasting drought in central China has lowered water levels in many of the region's lakes and rivers, doing great harm to the dolphins' habitat and leading to a decrease in population, Wang said.Mei Zhigang, a member of Wang's survey team, said that human activity has also contributed to the dropping population.Mei said that large numbers of shipping vessels on the Yangtze have impeded the dolphins' migration path, causing them to reproduce less frequently.

SAN FRANCISCO, July 12 (Xinhua) -- U.S. videogame giant Electronic Arts Inc. (EA) on Tuesday said it has agreed to buy PopCap Games, a leading provider of casual games for digital platforms, in a deal to accelerate its digital transformation.EA said it will pay about 650 million U.S. dollars in cash and 100 million dollars in shares of EA common stock to acquire privately-held PopCap, the maker of blockbuster games including " Plants vs. Zombies," "Bejeweled" and "Zuma".In addition, PopCap's owners are entitled to receive as much as 550 million dollars in earn-outs if certain earnings targets are met through December 2013, according to EA, which is headquartered in Redwood City in the U.S. state of California.Logos of PopCap Games and Electronic Arts Inc."EA and PopCap are a compelling combination," John Riccitiello, EA's chief executive officer, said in a statement."PopCap's great studio talent and powerful IP add to EA's momentum and accelerate our drive towards a 1-billion-dollar digital business," he noted.PopCap is one of the largest providers of casual videogames for mobile phones, tablets, PCs and social network sites, with more than 150 million games installed and played worldwide on platforms such as Facebook, RenRen, Google, iPhone, iPad and Android.EA said the purchase of PopCap is expected to close in August this year, subject to customary closing conditions including regulatory approvals.

CANBERRA, Sept. 6 (Xinhua) -- A rare virus that can be contracted by humans has killed a large number of Victorian pigeons after being detected in the Australian state for the first time, Agriculture Department confirmed on Tuesday.According to the Australian Chief Veterinary Officer, Dr Mark Schipp, the avian paramyxo virus has already started killing some hobby birds, and threatens to spread to Victoria's chicken population.He said the affected birds have died suddenly in large numbers and have sometimes appeared tired or have shown neurological signs such as circling or head flicking before death.He added that the bug can also cause conjunctivitis or influenza-like symptoms in humans."The virus causes only mild, short-term conjunctivitis or influenza-like symptoms (in humans)," Australia Associated Press quoted Schipp as reporting on Tuesday."Human infection with this virus is extremely rare and usually occurs only in people who have close direct contact with infected birds."At this stage, there are no reports of the virus causing disease in wild birds, but the Australian Wildlife Health Network has been asked to monitor the situation.

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