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BEIJING, Aug. 3 (Xinhuanet) -- NASA Tuesday confirmed a 4-foot in diameter sphere debris as a fuel tank that was part of the space shuttle Columbia's electrical power system,according to U.S. news reports.NASA engineers identified the 4-foot piece of spherical debris as one of the18 tanks that held chilled oxygen and hydrogen used by the shuttle's electricity-generating fuel cells.This Aug. 1, 2011 handout photo provided by the Nacogdoches Police Department shows a 4-feet in diameter sphere found in Lake Nacogdoches, Texas on Monday, Aug. 1. Police say low water levels at the lake during the drought have led to recovery of a container-like object that could be from space shuttle Columbia. The shuttle broke apart and burned in February 2003, scattering remnants over East TexasPolice in the city of Nacogdoches, about 160 miles northeast of Houston, said Monday the low water levels of Lake Nacogdoches during the record drought revealed an unexpected object that could be from space shuttle Columbia. The shuttle broke apart and burned as it re-entered the atmosphere on February 1, 2003.The tank will be moved to the Kennedy Space Center, where the rest of the Columbia is stored. Approximately 40 percent of the spacecraft has been recovered.

WASHINGTON, July 27 (Xinhua) -- The solar-powered, Jupiter- bound Juno spacecraft was secured into place on top of its rocket Wednesday in preparation for launch next month, the U.S. National Aeronautics and Space Administration (NASA) announced.The launch period for Juno opens Aug. 5 and extends through Aug. 26. For an Aug. 5 liftoff, the launch window opens at 11:34 a.m. EDT (1534 GMT) and remains open through 12:43 EDT (1643 GMT).Juno will arrive at Jupiter in July 2016 and orbit its poles 33 times to learn more about the gas giant's interior, atmosphere and aurora."We're about to start our journey to Jupiter to unlock the secrets of the early solar system," said Scott Bolton, the mission 's principal investigator from the Southwest Research Institute in San Antonio. "After eight years of development, the spacecraft is ready for its important mission."
WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to a study published Thursday in the online edition of journal Cell,A Kyoto University team coaxed mouse embryonic stem cells into sperm precursors, called primordial germ cells (PGCs), and shown that these cells can give rise to healthy sperm. The researchers say that such in vitro reconstitution of germ cell development represents one of the most fundamental challenges in biology.When transplanted into mice that were unable to produce sperm normally, the stem cell derived PGCs produced normal-looking sperm, which were then used to successfully fertilize eggs. These fertilized eggs, when transplanted into a recipient mother, produced healthy offspring that grew into fertile male and female adult mice. The same procedure could produce fertile offspring from induced pluripotent stem cells that are often derived from adult skin cells."Continued investigations aimed at in vitro reconstitution of germ cell development, including the induction of female primordial germ cell-like cells and their descendants, will be crucial for a more comprehensive understanding of germ cell biology in general, as well as for the advancement of reproductive technology and medicine," the researchers wrote.
BEIJING, Sept. 24 (Xinhuanet) -- The city government called on residents to register their dogs on time and keep better control of them to fight the increasing number of rabies cases during a discussion of the Beijing Municipal People's Congress on Friday."As the number of dogs in the city rises, the number of dog bites is also going up," said Lei Decai, director of the rural affairs committee of the people's congress.Last year, more than 30,000 residents were bitten by dogs and nine died of rabies. As of June this year, six people have died of rabies, Lei said."The main problem lies in the registration of dogs," he said, adding that the number of unlicensed dogs in the city is unknown. A man takes his dog for a spin on the back of a motorized tricycle in a Beijing street last month. The city plans to strengthen management of dogs in the future in an effort to combat the spread of rabies, which can be fatal if it is not treated in timeAt the beginning of June, eight residents were attacked by dogs in Beijing's Olympic Forest Park.One of them, Zhao Haiyan, 56, a retiree, was bitten in her left leg as she walked in the park. The puncture wounds left her leg bleeding."An officer in the park brought me to a hospital to get vaccinated for rabies, and I had no idea who I could ask for compensation, because the dog was fed by workers in a construction site and had no registration," she told China Daily."Now I worry when I see an unleashed dog," she added.Zhao is not alone. Cao Lifang, also 56, has helped a friend care for a dog since February. Dabai, a 6-year-old male Samoyed, bit her in mid-June when she was trying to keep him from fighting another dog.The attack left a deep bite mark on Cao's left hand, and she had to take anti-rabies injections for more than a month.
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