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CANBERRA, Sept. 24 (Xinhua) -- Australian scientists on Saturday said a satellite due to re-enter Earth poses a negligible threat to life and property on Earth.U.S. National Aeronautics and Space Administration's Upper Atmosphere Research Satellite (UARS), which weighs more than five tons, is expected to re-enter the Earth's atmosphere at 1058 (AEST) on Saturday. The U.S.-based Center for Orbital and Re-entry Debris Studies estimates that re-entry could occur up to seven hours before or after this time.According to Nonathan Nally, a former editor of two space magazines and currently editor of the Australian Space News website, the satellite poses a negligible threat to life and property on Earth."Most of the satellite will burn up on re-entry, with perhaps as many as 26 stronger or harder small pieces surviving to reach the surface," Nally said in a statement."But with the majority of the Earth comprising oceans or uninhabited (or very sparsely populated) remote regions, the chances are overwhelming that any pieces of UARS that survive re- entry will fall harmlessly and never be seen again."Since the spacecraft is no longer powered, U.S. National Aeronautics and Space Administration has no control over where it comes down, but Nally said there is a small chance that debris from the satellite could land in Australia.Debris from SkyLab, another satellite which plunged to Earth, was scattered over parts of Western Australia in 1979. Skylab weighed about 77 tonnes, many times more than the UARS.?Dr Alice Gorman, a lecturer in the Department of Archaeology, specializing in space archaeology, at Flinders University in South Australia, said the UARS satellite re-entry is very reminiscent of Skylab in 1979."There is the same exaggeration of the hazard through the media, public anxiety as the advance warning allows for speculation, and a lack of understanding of what the risks actually are," he said in a statement."Should it land in Australia, we might expect the same rush for souvenirs as we saw with Skylab, as anything that has been in space has a special meaning on Earth."?UARS was launched on 12 September 1991 and decommissioned on 15 December 2005. Its total dry mass is about 5.5 tonnes. UARS is one of the largest NASA satellites to plunge back to Earth uncontrolled in the last 30 years.Since the beginning of the Space Age in the late-1950s, there have been no confirmed reports of an injury resulting from re- entering space objects.? Nor is there a record of significant property damage resulting from a satellite re-entry.

KIEV, Aug. 2 (Xinhua) -- Ukraine's regional health authority declared Tuesday a cholera epidemic in the eastern region of Donetsk had ended.All 26 people who had been treated for the disease had been discharged from hospital, the press-service of the Donetsk Regional Sanitary and Epidemiological Service said on its official website.As of this week, no new cases had been registered, the statement said.The cholera outbreak hit eastern Ukraine in late May. The disease can cause rapid dehydration and death.The outbreak was believed to be associated with fish and drinking water supplies from the Sea of Azov.

BEIJING, June 27 (Xinhuanet) -- A lost tribe has been spotted in the Amazon rainforests of Brazil, according to the media report Monday.The discovery was confirmed by National Indian Foundation (FUNAI) of Brazil, a government body overseeing indigenous peoples.The tribe was initially found through satellite images earlier this year and later confirmed by the observers in aerial fight over the area.There are approximately 200 members in this isolate community who share three straw-roofed buildings and make their living from growing corns, bananas and other crops.FUNAI does not contact with the new-found tribe or give its exact location in order to protect its life from being disturbed."Among the main threats to the well-being of these groups are illegal fishing, hunting, logging, mining, cattle ranching and drug trafficking," FUNAI coordinator Fabricio Amorim warned."The work of identifying and protecting isolated groups is part of Brazilian public policy," he said, and "to confirm something like this takes years of methodical work."

JOHANNESBURG, June 1 (Xinhua) -- An estimated 2 million adolescents ages 10 to 19 are living with HIV, with 86 percent of them from sub-Saharan Africa, according to a global report on HIV prevention launched in Johannesburg on Wednesday.For the first time, the world gets to see the number of adolescents between the ages of 10 to 19 living with HIV in the report named Opportunity in Crisis: Preventing HIV from early adolescence to young adulthood.The report is a jointly publication by the United Nations Children's Fund (UNICEF), UNAIDS, the United Nations Educational, Scientific and Cultural Organization (UNESCO), the United Nations Population Fund (UNFPA), the International Labor Organization (ILO) , the World Health Organization (WHO) and World Bank.According to the report, people aged 15-24 accounted for 41 percent of new infections over the age of 15 in 2009. Worldwide, an estimated 5 million young people in that age group were living with HIV in 2009. Most of them live in sub-Saharan Africa. Globally, young women make up more than 60 percent of all young people living with HIV. In sub-Saharan Africa that rate jumped to 72 percent.Despite these challenges, the report acknowledges that some progress has been made in preventing new infections among young people."In many high-burden countries, HIV prevalence and incidence have declined among young people. While in 2001 there were 5.7 million young people living with HIV, the figure stands at 5 million (in 2009)," said the UNICEF eastern and southern Africa regional director, Elhadj As Sy, at the media briefing.He pointed that sexual transmission and injection drug use remain the major modes of transmission of HIV among young people. Early sexual debut, early pregnancy and early experiences with drug use all raise risks for HIV infection.The report reveals that unemployment and poverty are reported as the main reasons young people enter the sex trade. Worldwide, many young people driven by economic pressure, exploitation, social exclusion and lack of family support turn to commercial sex and injecting drug use.In 2001, the world made a commitment to reduce the prevalence of HIV among young people by 25 percent by 2010. The actual reduction achieved (from 5.7 million to 5 million) is 12 percent, and it represents less than half the target percentage."To avoid the current programming failures, we have to adopt a ' Continuum of Prevention Approach'." said Lina Mousa, deputy director of UNFPA Africa Regional Office."This continuum of prevention must be reflected in national HIV strategic plans, poverty reduction strategies and global fund proposals. This response must be developed with and for young people so that they own the response together with their communities," she added.To build this continuum of prevention for adolescents and young people, the reports outlined nine specific recommendations including providing young people with information and comprehensive sexuality education, strengthening child protection and social protection measures, engaging communities in shaping a positive social environment that promotes healthy behavior, establishing laws and policies that respect young people's rights.

XI'AN, Sept. 18 (Xinhua) -- At least 12 people were killed and 22 others missing over the weekend in rain-triggered landslides in northwestern Shaanxi Province, local officials said.As of 5:30 p.m. Sunday, rescuers had retrieved 10 bodies from beneath the rocks and mud in Baqiao District of the provincial capital of Xi'an, while another five were injured, said Zhu Zhisheng, vice mayor of Xi'an, who was at the site.Another 22 people remained missing, Zhu said, adding the injured were hospitalized and in stable condition.The landslide around 2 p.m. Saturday unleashed about 100,000 cubic meters of rock and mud down the mountain, engulfing a brick factory and destroying part of a nearby ceramics factory in the suburban district of Xi'an.Rescuers found four bodies on Saturday night and six others were retrieved on Sunday.More than 700 police, firefighters and local residents joined the rescue which went on Sunday night.However, the rescue was hampered by three ensuing slides between 10 a.m. and 11 a.m. Sunday as heavy rains continued slashing the city.About 10,000 cubic meters of newly-triggered rock and mud roared down to the site, forcing rescuers to suspend searching temporarily.Heavy downpours in the province also caused havoc in other areas.A heavy rainfall on Saturday night triggered a landslide that buried a residential house in the suburban district of Jintai in Baoji City, some 175 km to the west of Xi'an.Two people were dug out but later died after they were rushed to a nearby hospital, the municipal government of Baoji said in a statement Sunday.The downpours also brought a landslide in the same district early Sunday morning. Three people were saved and sent to a local hospital, according to the statement.The three wounded were in stable condition, doctors at the hospital said.

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