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WASHINGTON, March 25 (Xinhua) -- Researchers at the University of Colorado (CU) and the Harvard University have found that people living at higher altitudes have a lower chance of dying from ischemic heart disease and tend to live longer than others, according to a study published this week in the Journal of Epidemiology and Community Health.They spent four years analyzing death certificates from every county in the United States. They examined cause-of-death, socio- economic factors and other issues in their research.They found that of the top 20 counties with the highest life expectancy, eleven for men and five for women were located in Colorado and Utah. And each county was at a mean elevation of 5, 967 feet above sea level. The men lived between 75.8 and 78.2 years, while women ranged from 80.5 to 82.5 years.Compared to those living near sea-level, the men lived 1.2 to 3. 6 years longer and women 0.5 to 2.5 years more."If living in a lower oxygen environment such as in our Colorado mountains helps reduce the risk of dying from heart disease it could help us develop new clinical treatments for those conditions," said Benjamin Honigman, professor of Emergency Medicine at the CU School of Medicine. "Lower oxygen levels turn on certain genes and we think those genes may change the way heart muscles function. They may also produce new blood vessels that create new highways for blood flow into the heart."Another explanation, he said, could be that increased solar radiation at altitude helps the body better synthesize vitamin D which has also been shown to have beneficial effects on the heart and some kinds of cancer.Despite these numbers, the study showed that when socio- economic factors, solar radiation, smoking and pulmonary disease were taken into account, the net effect of altitude on overall life expectancy was negligible.Still, Honigman said, altitude seems to offer protection against heart disease deaths and may also play a role in cancer development.Colorado, the highest state in the nation, is also the leanest state, the fittest state, has the fewest deaths from heart disease and a lower incidence of colon and lung cancer compared to others.

LOS ANGELES, May 2 (Xinhua) -- An asteroid will fly past Earth this fall at a close approach that will allow a close-up view of one of Earth's good-sized space rocks, NASA's Jet Propulsion Laboratory (JPL) announced on Monday."On November 8, asteroid 2005 YU55 will fly past Earth and at its closest approach point will be about 325,000 kilometers away," said Don Yeomans, manager of NASA's Near-Earth Object Program Office at the JPL in Pasadena, Los Angeles."This asteroid is about 400 meters wide -- the largest space rock we have identified that will come this close until 2028."Despite the relative proximity and size, "YU55 poses no threat of an Earth collision over, at the very least, the next 100 years, " Yeomans said in a press release."During its closest approach, its gravitational effect on the Earth will be so miniscule as to be immeasurable. It will not affect the tides or anything else.""While near-Earth objects of this size have flown within a lunar distance in the past, we did not have the foreknowledge and technology to take advantage of the opportunity," said Barbara Wilson, a scientist at JPL. "When it flies past, it should be a great opportunity for science instruments on the ground to get a good look.""The best resolution of the radar images was 7.5 meters per pixel," said JPL radar astronomer Lance Benner. "When 2005 YU55 returns this fall, we intend to image it at 4-meter resolution with our recently upgraded equipment at the Deep Space Network at Goldstone, California. Plus, the asteroid will be seven times closer. We're expecting some very detailed radar images."Asteroid 2005 YU55 was discovered in December 2005 by Robert McMillan, head of the NASA-funded Spacewatch Program at the University of Arizona, Tucson. The space rock has been in astronomers' crosshairs before.In April 2010, Mike Nolan and colleagues at the Arecibo Observatory in Puerto Rico generated some ghostly images of 2005 YU55 when the asteroid was about 2.3 million kilometers from Earth.

BEIJING, Feb. 2 (Xinhua) -- From dumplings in the north and rice cakes in the south, people across China Wednesday overloaded their tables with holiday foods, cheering for the Spring Festival family reunion and praying for a better life in the coming Year of Rabbit.In a remote village in Guizhou Province, villagers were sharing millet cakes and preserved pork as sunshine dispelled cold and sleet, which have plagued China's southwest for a month."This year's Spring Festival is especially cheerful, since our dream of a new home has come true," said villager Zhang Jiuyun.Zhang's home was severely damaged in the snow and sleet disaster, but with the help of local villagers and funds from the government, Zhang built a larger house without spending much money.The Spring Festival is also an important occasion for migrant workers to enjoy family reunions after toiling for higher incomes in wealthy coastal provinces for a year."I've brought back red wine and cookies imported from Italy as gifts for my parents," said Ding Zhenghe, a Shenzhen-based factory owner who has worked his way up from a migrant worker.But Ding said, after years in the modern city, he still yearns for the the food cooked by his mother in the rural home.The Spring Festival, which falls on Thursday, also marks the start of the Year of the Rabbit. It is a time for family dinners, gift giving and fireworks.Nangkun Tashi, a villager in the earthquake-hit Yushu, northwest China's Qinghai Province, celebrated the first Lunar New Year after the disaster with traditional Tibetan food, such as mutton and butter tea.A 7.1-magnitude earthquake jolted Yushu in April 2010, killing about 2,200 people and leaving Tashi's village in ruins.Tashi's family narrowly survived the quake, and have recently moved into a new home, which was provided by the local government two months before.In Zhouqu County, Gansu Province, 990 tons of grains have been delivered to the 473 survivors, who now lived in temporary housing after a massive landslide leveled the county, leaving over 1,500 people dead in August."We are able to hold a celebration, even though we've lost everything in the landslide," said local resident Yao Shelin."We've received flour, cooking oil, and even the wok is a donation," said Yao.

LOS ANGELES, April 17 (Xinhua) -- Global warming will melt all the ice in the Arctic Ocean every summer, raising earth temperatures even further, researchers at the University of California-Los Angeles (UCLA) warned.The findings, available online Sunday in the April issue of Earth and Planetary Science Letters, a leading journal in geoscience, were based on analysis of the fossilized remains of four-million-year-old mollusks, they said.Two novel geochemical techniques used to determine the temperature at which the mollusk shells were formed suggest that summertime Arctic temperatures during the early Pliocene epoch (3.5 million to 4 million years ago) may have been a staggering 18 to 28 degrees Fahrenheit warmer than today, the researchers said.And these ancient fossils, harvested from deep within the Arctic Circle, may have once lived in an environment in which the polar ice cap melted completely during the summer months, according to the researchers.Such balmy polar weather would certainly melt all the ice in the Arctic Ocean every summer, said Aradhna Tripani, an assistant professor at the UCLA's departments of Earth and space sciences."Our data from the early Pliocene, when carbon dioxide levels remained close to modern levels for thousands of years, may indicate how warm the planet will eventually become if carbon dioxide levels are stabilized at the current value of 400 parts per million," she said.The earth's temperature was raised five to nine degrees Fahrenheit merely by the absence of year-round Arctic ice, according to Tripani.The results of the study lend support to assertions made by climate modelers that summertime sea ice may be eliminated in the next 50 to 100 years, which would have far-reaching consequences for Earth's climate, she said."The Intergovernmental Panel on Climate Change identifies the early Pliocene as the best geological analog for climate change in the 21st century and beyond," said Tripati. "The climate-modeling community hopes to use the early Pliocene as a benchmark for testing models used for forecasting future climate change."

TIANJIN, April 16 (Xinhua) -- As China tries to establish a universal medicare umbrella, its first move to offer treatment to all the hemophilia patients in the country is to know their population and where they are.China's national hemophilia information management center registered 7,980 cases nationwide since its establishment last year in a bid to provide reference for making national treatment policies and medicine production quota, said the center officials Saturday.Yang Renchi with the center and the Chinese Academy of Medical Sciences, said that the patient information database will help the government make hemophilia-related medical and social welfare policies, optimize resources and guide the manufacturing of drugs such as coagulation factor VIII.The information center, created by the Ministry of Health, is located in the Blood Diseases Hospital of the Chinese Academy of Medical Sciences in the port city Tianjin in north China.Hemophilia is a rare genetic bleeding disorder that prevents the blood from clotting properly, resulting in easy bruising and prolonged bleeding from trauma. Lack of treatment can lead to permanent disabilities or even death.China is estimated to have roughly 100,000 hemophilia patients."Be inspired; get involved in Treatment for All" is the theme for the 22nd World Hemophilia Day, which falls on Sunday, April 17."A necessary precondition for 'Treatment for All' is to know the clinical information and location of each case," said Yang, "and this is exactly what the information system does."In addition, China plans to establish hospital-based provincial hemophilia management centers within five years across the country to register and monitor patients and standardize disease diagnosis and treatment under the information system.SHORTAGE OF DRUGSBlood-derived coagulation factor VIII and recombinant coagulation factor VIII are two effective drugs which are vital for hemophiliacs. However, the drugs are expensive and produced in limited quantities, a difficulty which hundreds of thousands of hemophiliacs in China have to confront.According to Yang, the minimum dose of coagulation factor VIII for prevention of bleeding episodes is two international units (IU) per kg of weight a day. A 50-kg hemophilia patient needs at least 36,500 IU of factor VIII every year to prevent bleeding."Each IU of blood-derived coagulation factor VIII costs about 3 yuan(0.46 U.S. dollars) and the annual cost is almost 120,000 yuan. The recombinant one is almost twice the price," said Yang.Only four drug firms are qualified to manufacture blood-derived coagulation factor VIII in China. The national output in 2010 was 400,000 vials (200 IU per vial) which means 80 million IU for the entire country.Wu Runhui, a hematology specialist with the Beijing Children's Hospital, said that the minimum dose is only for the prevention of bleeding episodes which are required to keep the patient alive. For the hemophiliac to live a regular lifestyle, 3,000 IU per kilo a year is needed, which would cost half a million yuan a year."Even in the most developed countries, a hemophiliac cannot survive without supportive medical policies and social welfare system," said Wu.