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WASHINGTON, Aug. 4 (Xinhua) -- Observations from NASA's Mars Reconnaissance Orbiter have revealed possible flowing water during the warmest months on Mars, the U.S. National Aeronautics and Space Administration (NASA) announced Thursday.Dark, finger-like features appear and extend down some Martian slopes during late spring through summer, fade in winter, and return during the next spring. Repeated observations have tracked the seasonal changes in these recurring features on several steep slopes in the middle latitudes of Mars' southern hemisphere."The best explanation for these observations so far is the flow of briny water," said Alfred McEwen of the University of Arizona, Tucson.McEwen is the principal investigator for the orbiter's High Resolution Imaging Science Experiment and lead author of a report about the recurring flows to be published in Friday's edition of the journal Science.Seven such sites on the planet have been confirmed, with 20 more possible, McEwen said."What makes these new observations so interesting is they occur at much lower latitudes where temperatures are much warmer and where it's actually possible for liquid water to exist," said Arizona State University geophysicist Phil Christensen, one of the scientists who studied the images beamed back from the orbiter.The study does not prove water exists, but identifies it as the best explanation. It's worthwhile to think about alternative reasons for these observations, but none seems to fit as well as briny water, McEwen said."I think it's going to be laboratory experiments on Earth that give us the best confirmation or refutation," he said.

BERLIN, June 10 (Xinhua) -- The German state of North Rhine-Westphalia said Friday it detected for the first time the deadly E.coli strain o104 on bean sprouts, after they were named the source of the outbreak by Germany's national disease control centre. "According to our knowledge, the bean sprouts are coming from the recent suspicious farm in Bienenbuettel in the state of Lower Saxony," said Johannes Remmel, consumer protection minister.The sprouts were found in an opened package which had been left in a dustbin of a family, living near the city of Bonn. Two of the family members had eaten the sprouts and contracted the E. coli infection in mid-May, he said.A notice warning consumers not to eat raw bean sprouts is seen at a market in Berlin, capital of Germany, June 10, 2011. The German authority said on Friday bean sprouts were probably the source of the E. coli outbreak, which has killed 30 people and infected about 3,000 around the world. Reinhard Burger, president of the Robert Koch Institute (RKI), Germany's national disease control center said the Robert Koch Institute was lifting its warning against eating cucumbers, tomatoes and lettuce but keeping the warning in place for the sprouts."The discovery confirms our current warning against the consumption of bean sprouts. It is therefore becoming increasingly more likely that bean sprouts are the source of the E.coli infections," Remmel said.The news came after Reinhard Burger, President of the Robert Koch Institute (RKI), said in the morning bean sprouts were the source for the outbreak based on a epidemiological investigation."People who ate (bean) sprouts were found nine times more likely to have bloody diarrhoea or other signs of E. coli infection than those who did not," he saidHowever, no sample tests had found the o104 strain on bean sprouts when he announced that conclusion. Laboratory tests have shown Germany made mistakes in identifying the outbreak source on two previous occasions.At the same time, RKI lifted the warning against cucumbers, tomatoes and lettuce."Enjoy lettuce, cucumbers and tomatoes. They are healthy for you," said Andreas Hensel, president of the German Federal Risk Assessment Institute (BFR), which is a co-leader in the action against E. coli.In the city of Hamburg, an epicentre for the disease, farmers protested in the city centre by offering tons of lettuce and cucumbers for free to anyone who wanted them when the news was announced. Suddenly, pedestrians turned from reluctant to eager takers, reported local news agency DPA.

BEIJING, June 27 (Xinhuanet) -- A "lean gene" that helps people keep slim was found closely related to diabetes and heart disease, according to a study pulished in Nature Genetics journal on Sunday.The scientists from Britain’s Medical Research Council Epidemiology Unit conducted the study.After comparing the genetic codes of more than 75,000 people, a gene called IRS1 was spotted as the decisive factor to lower the fat level in human body.But in further study, IRS1 was found putting people to a 20 percent higher risk of developing heart disease and type-2 diabetes.The study warned that people who appear slim and fit might be also at risk.But scientists suggest that the study results did not change the general message for most people."While this study pointed to genes as one factor in determining the risk of developing these conditions, it was important to remember that lifestyle factors like diet, exercise, cutting out smoking and maintaining a healthy weight also play a vital role in reducing the risk," said Ruth Loos, who led the study.

BONN, Germany, June 17 (Xinhua) -- The latest United Nations (UN) climate talks ended here on Friday with no surprise -- some " technical issues" saw some progress, as delegates usually said, while major disagreements remained.The two-week UN climate negotiations have made "clear advances" on such issues as extending carbon trading mechanisms, climate fund management and slowing deforestation, Christiana Figueres, UN Framework Convention on Climate Change (UNFCCC) executive secretary, said at a closing press conference.Figueres said delegates from 183 countries stepped forward with a technology mechanism to boost global green technology sharing. The mechanism will include a Climate Technology Center and Network to establish a worldwide clean technology stakeholder community.As for the implementation of a comprehensive package of the Cancun summit last year, this Bonn session has "paved the way" for progress at the next UN ministerial-level climate conference, which is to be held in Durban, South Africa from Nov. 28 to Dec. 9, Figueres said."Strong convergence has emerged on how the Adaptation Committee will be governed, what its composition will be and what its specific role will be," she said. "This progress means that the Committee could be fully operationalized at Durban."The UN climate chief stressed that governments, business circles and civil society cannot solve issues related to climate change "in one meeting," and climate talks are "the most important " negotiations the world has ever seen."The Bonn meeting is practical, focusing on concrete issues. In general, the negotiating process is moving forward step by step and on the right track," Su Wei, China's chief negotiator, told Xinhua on Friday."Despite setbacks and reversals, parties are taking climate change seriously and are willing to promote the negotiations under the Bali Roadmap," he said. "In the past two weeks, contact groups are busy making informal consultations on various topics.""Admittedly, in some key areas, there is a gap among parties," Su said.During the meeting, many delegates and observers have complained that the pace of negotiation was unbearably slow, especially against the backdrop of a new warning from the International Energy Agency, which said the global energy-related carbon emissions rose to a record high in 2010 despite decade-long efforts on curbs.Experts said one of the main hurdles in current talks was still the old topic -- the fate of the Kyoto Protocol, the sole legally- binding pact on industrial countries' emission cuts set to expire at the end of 2012.The protocol, which binds 37 rich countries, has been crippled since Cancun, as Japan, Canada and Russia have clearly stated they would not extend the pact's second commitment period after 2012.The United States, which never ratified the treaty, said it would not accept any legal deal unless other major economies have similar emission constraints.The European Union (EU), the last major bloc that is open to the renewing of the Kyoto Protocol, said its supportive attitude should not be taken for granted. The EU said it would not unilaterally step up efforts on combating climate change if other nations are not willing to do the same.Meanwhile, developing countries insisted that the updating of the Kyoto Protocol remains "the very core issue" of current talks, asking rich nations to shoulder their historical responsibilities and preserve the pact as a major legally-binding instrument to tackle climate change.The Group of 77 and China, representing over 130 developing nations, have said that the renewal of the Protocol should be the priority for Durban.On Friday, Figueres said that "resolving the future of the Kyoto Protocol is an essential task this year and will require high-level political guidance.""By Durban, governments need to come forward with options that will be acceptable to all parties," she said, adding that high- level contacts are necessary to break the ice.She told reporters that environment ministers are due to meet in Berlin from July 3 to 4, known as a continuation of last year's ministerial-level informal talks held in the town of Petersburg near Bonn. Moreover, world leaders are due to discuss climate change on the sidelines of the UN General Assembly in September.Before the Durban summit, delegates have agreed to hold an additional round of climate talks in late September or early October, Figueres revealed.