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WASHINGTON, Dec. 21 (Xinhua) -- NASA's Dawn spacecraft has sent around 10,000 pictures of the giant asteroid Vesta back to Earth for the first time since its launch in 2007, the U.S. space agency announced Wednesday.The images were taken from an average altitude of 209 km, the closest the spacecraft can get.From the images, scientists could see Vesta's stippled and lumpy surface in great detail, and its many small craters, grooves, and lineaments. The fine scale of the images highlights small outcrops of bright and dark material.With these new discoveries, scientists believe that studying Vesta can help decode the early history of the solar system.Dawn will maintain its low-altitude orbit for another 10 weeks before moving to a higher orbit for another round of photo-taking.Launched in 2007, the 446 million U.S. dollar project aims at studying the chemical composition of Vesta's surface and probing its interior structure.Dawn will leave Vesta in July next year and arrive at the dwarf planet Ceres in February 2015.

BEIJING, Oct. 6 (Xinhua) -- China's first space lab module were in good condition and all tests went on "smoothly" during the past week, according to a statement issued by the country's space project authorities Thursday.The unmanned module, Tiangong-1, or Heavenly Palace-1, blasted off on Sept. 29 from Jiuquan Satellite Launch Center in northwest China's desert area.Tiangong-1 switched to the orbit of 362 kilometers high and had orbited the Earth for 109 times by 6:00 p.m. Thursday, the statement said.Tests on the module's remote control system, video/audio equipments, temperature/humidity sensors, docking facilities and other functions had been conducted successfully, it added.It also revealed that the Jiuquan Launch Center and other units were preparing for the launch of the Shenzhou-8 unmanned spacecraft, which is scheduled to join the Tiangong-1 later this year.Shenzhou-8 and Tiangong-1 are expected to perform China's first space docking at a height of 340 kilometers above the earth's surface.

WASHINGTON, Oct. 13 (Xinhua) -- In a trial that included about 35,000 men, those who were randomized to receive daily supplementation with vitamin E had a significantly increased risk of prostate cancer, according to a study published this week in the Journal of the American Medical Association.The study followed more than 35,533 men 50 or older at 427 sites in the United States, Canada and Puerto Rico. The men were divided into four groups who took daily doses of 400 international units of Vitamin E and 200 micrograms of selenium; Vitamin E and a placebo that looked like selenium; selenium and a placebo that looked like Vitamin E; or two placebos. The recommended daily intake of Vitamin E is about 22.4 international units.The researchers from the Cleveland Clinic found that the rate of prostate cancer detection was greater in all treatment groups when compared with placebo but was statistically significant only in the vitamin E alone group -- a 17 percent increased rate of prostate cancer detection. The difference in rates of prostate cancer between vitamin E and placebo became apparent during the participants' third year in the trial. The elevated risk estimate for vitamin E was consistent across both low- and high-grade disease."The observed 17 percent increase in prostate cancer incidence demonstrates the potential for seemingly innocuous yet biologically active substances such as vitamins to cause harm. The lack of benefit from dietary supplementation with vitamin E or other agents with respect to preventing common health conditions and cancers or improving overall survival, and their potential harm, underscore the need for consumers to be skeptical of health claims for unregulated over-the-counter products in the absence of strong evidence of benefit demonstrated in clinical trials," the researchers said.

BEIJING, Dec. 30 (Xinhua) -- China's quality watchdog said Friday that the latest checks by testing organizations did not find excessive levels of aflatoxin in milk products made by Chinese dairies.The special checks were launched after the General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ) reported on Dec. 23 that two batches of milk products made by two separate domestic dairies, including heavyweight Mengniu Dairy Group, were found to contain high levels of the cancer-causing toxin.A brief statement on the government agency's website Friday said the checks have covered major makers, including Mengniu, Yili Industrial Group, Bright Dairy, and Sanyuan Food.An AQSIQ official said earlier the toxin had originated from cows eating mildewed feed, citing reviews by experts. The toxin would disappear if the animals stop eating the rotten feed, the official said.Aflatoxin is produced by a fungus that commonly grows on crops such as grain and peanuts. High levels of the toxin may lead to cancer in some animals.

NANJING, Jan. 7 (Xinhua) -- Police authorities in China's eastern Jiangsu Province on Sunday intensified their search for the suspect in an armed robbery in the province.Police have increased patrol and initiated a blanket search for the male suspect, who shot and robbed a man in front of a bank in Nanjing, the provincial capital, on Friday, the provincial public security bureau said in a statement.In Nanjing, special armed police and police cars have blocked major roads, with many others searching in public places. Two helicopters are used to facilitate the search.The provincial police authorities also offered a reward of 100,000 yuan (15,850 U.S. dollars) for information leading to the arrest of the man believed to be in his 40s.The suspect shot a man who had just finished withdrawing 200,000 yuan in front of a bank on Nanjing's Dongmen Street at 9:50 a.m. Friday. The robber then took the money and hopped in a car that sped away from the scene of the crime, Pei Jun, deputy chief of the Nanjing public security bureau, said Friday.Pei said the suspect is believed to have used a gun to kill six people and injure another two in six robberies that took place in Changsha, capital of Hunan Province, and Chongqing municipality since 2004.Firearm possession is illegal in China.