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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."

CANBERRA, May 27 (Xinhua) -- An Australian student has discovered a part of the universe that astrophysicists have spent decades trying to find, Australia's Monash University on Friday confirmed in a statement.Astrophysicists have long thought the universe has a greater mass than is visible in the planets, but they had no way of proving it is there.Undergraduate student Amelia Fraser-McKelvie, 22, was on a summer internship at Monash University to learn more about astrophysics, when she managed to solve one of the big mysteries of science.Fraser-McKelvie, an aerospace engineering student, conducted a targeted X-ray search for the matter and found evidence of it within three months.Her tutor, Kevin Pimbblet, said the discovery is significant."We've been looking for this ordinary matter for a couple of decades," he said in a statement on Friday."It's been published in one of the most prestigious journals in the world, so astronomers all over the world will be able to read this article."Scientists had thought the matter would have a temperature of about 1 million degrees Celsius, 1.8 million degrees Fahrenheit, and should therefore be observable at X-ray wavelengths.Amelia Fraser-McKelvie's discovery has proved that prediction is correct, Pimbblet said.The trio published a research paper on the missing mass in one of the world's oldest and most prestigious scientific journals, Monthly Notices of the Royal Astronomical Society.He said the discovery could change the way telescopes are built.

SHANGHAI, Feb. 19 (Xinhua) -- Shanghai and several other Chinese cities have moved to restrict home purchases in a bid to deflate bubbles in the real estate market.The rules, which were revealed by Shanghai's Housing Guarantee and Administration Bureau on Saturday, prohibits new home purchases from locally-registered families who have owned two or more homes and non-local registered families who have owned at least one home.Additionally, non-Shanghai registered families who have no documents certifying they have paid for social security or income tax in the city for one year are banned from buying property.Sales of commercial homes fell 42.4 percent year on year in Shanghai in 2010 as earlier measures to curb the speculative demand in the real estate market took effect.Despite the fall in sales volume, the average price of new commercial homes rose by 7.6 percent to 20,995 yuan (3,200 U.S. dollars) per square meter last year.On the same day, authorities in the eastern city of Nanjing and the northeastern city of Harbin rolled out similar purchase restrictions.On Wednesday, the Beijing municipal government unveiled even tougher measures to prohibit home purchases from non-local registered families who have no proof of social security or income tax payments in the Chinese capital for five straight years.The purchase limits came after the State Council, China's Cabinet, ordered late last month that cities where home prices are skyrocketing must implement strict measures to restrict home purchases over a period of time.The State Council also said that local governments will be responsible for the stable and healthy growth of property markets and are required to publicize, before the end of March, the annual "controlled" price targets for new homes.China has implemented a series of measures since last year, which includes higher down payment and lending rates, and bans on mortgage loans for third homes, to rein in the rapid rise in housing prices.Soaring prices have become a major concern for urban Chinese residents as more homes turn unaffordable. In fact, home prices in some major cities such as Beijing have more than doubled over the past two years.

LOS ANGELES, April 4 (Xinhua) -- A woman's breast milk cells may be used to predict cancer in future research, according to a study published by HealthDay News on Monday.In the study, researchers at the University of Massachusetts in Amherst collected breast milk from 271 women in the United States. All had either undergone a biopsy of the breast to check for cancer, or were scheduled for one.The researchers evaluated breast milk samples from the biopsied and non-biopsied breasts.The researchers first isolated potentially cancerous cells, known as epithelial cells, and then isolated DNA to look for signals that regulate tumor suppresser genes.In the next step, the researchers analyzed three genes among the many known to undergo a process called methylation in breast cancer. Methylation in a specific region of a gene can inhibit or suppress the expression of a gene.For one gene, SFRP1, the average methylation was higher in the biopsied breast, the study found.Among the women whose biopsies detected cancer, average methylation of the RASSF1 gene in the biopsied breast was considerably higher compared to the non-biopsied breast.Among the women whose biopsies detected cancer, average methylation of the RASSF1 gene in the biopsied breast was considerably higher compared to the non-biopsied breast."It looks as if we can use the cells from breast milk to assess breast cancer risk," said Dr. Kathleen Arcaro, an associate professor of veterinary and animal sciences at the university.It's too soon, however, to assess the cancer detection rate associated with breast milk cell examination, she said."We can't say at this point for two reasons," she said. "One is, we need long-term follow-up. And the second really important reason is, we need to sample a larger panel of genes."Arcaro is to present her findings later Monday at the annual meeting of the American Association for Cancer Research in Orlando, Florida, according to HealthDay News.

BEIJING, Jan. 30 (Xinhua) -- Chinese President Hu Jintao said Sunday more attention should be paid to raising people's living standards while striving for economic growth.Hu made the remarks at a symposium with non-Communist parties and individuals to mark the Spring Festival, or the Lunar New Year, which falls on Feb. 3 this year.Hu urged the parties and social groups to pursue the people-first principle and help the government to better serve the people."We should always make the improvement of people's lives an important starting point in promoting development in a scientific way and enhancing social harmony," Hu said.Chinese President Hu Jintao (C), also general secretary of the Communist Party of China (CPC) Central Committee and chairman of the Central Military Commission, delivers an important speech at a symposium with non-Communist parties and individuals to mark the Spring Festival in Beijing, capital of China, Jan. 30, 2011.He said the government would focus on the transformation of its economic development pattern, and try to achieve its economic targets this year, which is also the start of the 12th five-year period (2011-2015).Hu hoped the non-Communist parties and individuals would concentrate on promoting scientific development and put forward practical suggestions for achieving comprehensive, coordinated and sustainable development.This year marks the 90th anniversary of the founding of the Communist Party of China (CPC).Hu said the past 90 years had proved that unison of ideas, targets and actions in the multi-party cooperation system under CPC leadership guaranteed the country to achieve progress in revolution, development and reform.Hu expressed appreciation for the contributions of non-Communist parties and individuals to social and economic development last year."We must rely on all Chinese people, including non-Communist parties, societies, ethnic groups and people from all walks of life and in different strata to achieve this year's goals for economic and social development," said Hu.At the event, Hu also extended New Year's greetings and best wishes to all people from the non-Communist parties and the All-China Federation of Industry and Commerce and those without party affiliations.Non-Communist party leaders at the gathering gave opinions on issues such as multi-party cooperation, rural social security system, water conservation, strategic emerging industries, education and cultural exchanges across the Taiwan Straits.The meeting was chaired by Jia Qinglin, chairman of the National Committee of the Chinese People's Political Consultative Conference. Vice President Xi Jinping and Vice Premier Li Keqiang were present at the gathering.