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MOSCOW, May 24 (Xinhua) -- Russia's Soyuz TMA-20 spacecraft with three crew members onboard has landed in Kazakhstan on Tuesday, said the Mission Control Center (MCC) outside Moscow.The spacecraft undocked from the International Space Station early Tuesday, carrying Russian cosmonaut Dmitry Kondratyev, European Space Agency (ESA) astronaut Paolo Nespoli and NASA astronaut Catherine Coleman back to Earth.According to the center, the Soyuz TMA-20 landed in the Kazakh steppe at 6:27 Moscow time (0227 GMT). Some 17 planes and helicopters and several rescue vehicles had conducted search works.Flight engineers Catherine "Cady" Coleman of the U.S. (L) and Italian Paolo Nespoli (R), and Russian cosmonaut and station commander Dmitry Kondratyev are seen after the Soyuz capsule landed, about 150 km (93 miles) southeast of the Kazakh town of Zhezkazgan May 24, 2011. A Russian Soyuz capsule delivered an international trio of astronauts back to Earth on Tuesday after six months on the International Space Station, parachuting through clear skies toward a safe landing on the Kazakh steppe.Deputy head of Federal Medical and Biological Agency Vyacheslav Rogozhkin said Italian astronaut Naspoli had some health problem after landing."Two crew members are fine, the third one has some problems with his vestibular system," Rogozhkin told a press conference after the landing.In December, the Soyuz TMA-20 was launched from the Kazakh Baikonur space center with three crew members.The next launch of manned spacecraft to the ISS was scheduled in early June.

WASHINGTON, April 4 (Xinhua) -- Scientists have identified a gene that appears to play a role in regulating how much alcohol people drink, in a study of over 47,000 people published Monday in the Proceedings of the National Academy of Sciences.The researchers say that finding a common genetic variation influencing levels of alcohol consumption may lead to a better understanding of mechanisms underlying alcohol drinking behavior in the general population.The gene, called "autism susceptibility candidate 2", or AUTS2, has previously been linked to autism and attention deficit hyperactivity disorder, but its function is not known.The new study, by an international consortium led by scientists at Imperial College London and King's College London, found that there are two versions of the AUTS2 gene, one three times more common than the other. People with the less common version drink on average five percent less alcohol than people with the more common version.The gene is most active in parts of the brain associated with neuropsychological reward mechanisms, suggesting that it might play a part in regulating the positive reinforcement that people feel when they drink alcohol.Alcohol consumption is known to be partly determined by genes but until now the only gene known to make a notable contribution was the gene encoding alcohol dehydrogenase, an enzyme that breaks down alcohol in the liver.Professor Paul Elliott, from the School of Public Health at Imperial College London, said: "Of course there are a lot of factors that affect how much alcohol a person drinks, but we know from twin studies that genes play an important role. The difference that this particular gene makes is only small, but by finding it we've opened up a new area of research into the biological mechanisms that control drinking."

JINAN, May 14 (Xinhua) -- Chinese scientists said Saturday that they have found a new species of giant theropod dinosaur in the eastern province of Shandong.The new species, described as a close relative of Tyrannosaurus rex (T. rex), has been named "Zhuchengtyrannus magnus". Paleontological experts found it has unique upper jawbones after examining the skull and jawbones discovered in the city of Zhucheng.It was estimated to be about 11 meters long and 4 meters tall, weighing close to 7 tonnes."We discovered two kinds of tyrannosaurus fossils here and the identity of the other one still remains unclear," said Xu Xing, a researcher at the Institute of Vertebrate Paleontology and Paleoanthropology under the Chinese Academy of Sciences."We've named the new genus Zhuchengtyrannus magnus, which means the 'Tyrant from Zhucheng' because the bones were found in Zhucheng," Xu said.The bones were a few centimeters smaller than the similar bones in the largest T. Rex specimen, so there was no doubt that Zhuchengtyrannus was a huge tyrannosaur, Xu said.According to Xu, Zhuchengtyrannus magnus belonged to a specialized group of gigantic theropods called tyrannosaurines which existed in North America and eastern Asia during the Late Cretaceous Period that dated back about 65 to 99 million years.All tyrannosaurs were carnivorous, bipedal animals that generally had small arms and large skulls. Among the tyrannosaurs, the tyrannosaurines were the largest and characterized by having just two fingers on each hand and large powerful jaws to deliver a bone crushing bite. They were likely both predators and scavengers.The fossil quarry in Zhucheng contains one of the largest concentrations of dinosaur bones in the world. At least 10 dinosaur species have been found in three rounds of excavations since the 1960s, including Tyrannosaurus and Hadrosaurs.

JOHANNESBURG, March 23 (Xinhua) -- Cervical cancer ranks as the second most frequent cancer among women in South Africa.Recent information from a World Health Organization (WHO) and ICO Information Center on Human Papilloma virus (HPV) and Cervical Cancer 2010 report shows that 16.84 million South African women aged 15 years and older are at risk of developing cervical cancer.Current estimates indicate that every year 5,743 women are diagnosed with cervical cancer and more than 3,000 die from the disease.About 21 percent of women in the general South African population are estimated to harbor cervical HPV infection at any given time, and 62.8 percent of invasive cervical cancers are attributed to HPV subtypes 16 or 18."Concern is growing as there appears to be an increasing epidemic of papillomavirus-induced disease involving not only the cervix but elsewhere in the female genital tract and anogenital region," said Professor Martin Hale, head of the Department of Anatomical Pathology at the University of the Witwatersrand (Wits) in Johannesburg and the National Health Laboratory Service.The South African population and people from Africa in general have high incidences of the HPV subtypes 16 or 18 according to Professor Hale. He is not entirely sure why but is of the opinion that the infection rate can be lowered."The common theory is that HPV is transmitted through sexual intercourse. If treated like a sexual disease and the necessary precautions are taken during sex the infection rate can be lowered, " Hale told Xinhua in an interview on Wednesday.HPV is also exacerbated as a result of the HIV pandemic and cause a rapid progression of premalignant dysplasia to invasive cancer in HIV positive patients.Hale believes the limited access to information and resources make it easy for the condition to thrive.However, according to Hale, a debate is still raging on how, to whom and whether the vaccine should be administered.Black women are at higher risk of contracting HPV and subsequent cervical cancer. Other risk factors that increase susceptibility include age of first intercourse, the number of children per woman, and a weakened immune system, to name a few."To avoid getting cervical cancer get the vaccine against HPV 16 and 18 infection before starting to be sexually active, have protected sex and go for regular screenings," he told Xinhua.