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LIMA, May 5 (Xinhua) -- A total of 53.5 million people in Latin America and the Caribbean suffer from hunger or malnutrition, experts said at an international forum here Thursday.Juan Garcia, coordinator of the 5th work-group meeting of the Latin American and Caribbean Initiative Without Hunger, said the figure has not increased since 1990.Experts and officials from 13 countries gathered to discuss the challenges facing regional food security and advances that have been made, hoping to make cooperative efforts to eradicate hunger and malnutrition by the year 2025.Carcia said people affected most across the continent are still those living in rural areas as well as African descendants and indigenous people who suffer from "exclusion and inequality."The main cause of undernutrition is not lack of food-production capacity, but access to food, Carcia said.Six countries, Brazil, Ecuador, Venezuela, Guatemala, Honduras and Nicaragua, have approved food security laws with nine more in the process of doing so. The laws are considered as a way to ensure that local agricultural products are primarily used to feed the countries' own populations and not used for export.

BAIKONUR, Kazakhstan, April 5 (Xinhua) -- Russian manned spacecraft Soyuz TMA-21 has been transported to the launch pad and raised to a vertical position, ready to blast off on April 5, Xinhua correspondents reported Saturday from the site.The launch is dedicated to the 50th anniversary of the first flight into space in 1961 carried out by Russian cosmonaut Yuri Gagarin.For hours, journalists and tourists from all over the world had braved a nasty weather and watched the train and trucks delivering the rocket to the pad.Service towers move towards the Soyuz TMA-21 spacecraft, named after the first cosmonaut Yuri Gagarin, as it is set on its launch pad at Baikonur cosmodrome April 2, 2011. The International Space Station (ISS) crew of U.S. astronaut Ronald Garan and crew mates Russian cosmonauts Alexandr Samokutyaev and Andrey Borisenko is due to travel by Soyuz spacecraft to the ISS on April 5.The Soyuz TMA-21 rocket will deliver three crew members to the International Space Station (ISS) on April 5. In a six-month mission, these cosmonauts will carry out over 40 experiments.The Soyuz TMA modification is a replacement of the Soyuz TM as it was equipped with smaller and more efficient computers and improved displays. The Soyuz TMA-21 will also serve as the return vehicle of the ISS crew.

BEIJING, March 22 (Xinhuanet) -- An autopsy began Monday on Berlin zoo's superstar polar bear Knut who died suddenly on Saturday, media reports said.However, it remained unclear when the results from the post-mortem examination of Knut would be published."I cannot give you a timeline. We will inform the public when we know what the exact cause was," AFP quoted spokeswoman Claudia Bienek as saying.Knut died while sunbathing at Berlin zoo in Germany in front of visitors. The four-year-old swivelled around several times before falling backwards into the water in his enclosure.Witnesses said he suffered a series of convulsions and appeared to have had an epileptic fit or a heart attack.Knut was born in 2006 to a female bear who rejected him at birth. He was hand-raised by his keeper at the zoo. Films were made about him and he appeared on the front cover of Vanity Fair magazine and earned the zoo about 7.11 million U.S. dollars.More than 15,000 Knut fans have so far paid tribute to him on Berlin zoo's website. Hundreds more have flocked to the zoo in person to lay flowers at his enclosure.

LOS ANGELES, May 15 (Xinhua) -- Using a simple, minimally- invasive technique to analyze cells from the interior of the nose, U.S. researchers have detected lung cancer in its earliest stage.For the study, the researchers at the Boston University Medical Center collected nasal epithelial cells from thirty three smokers who were undergoing medically-indicated bronchoscopies for suspicion of lung cancer, according to the American Association for the Advancement of Science (AAAS) on Sunday.Of these patients, 11 were found to have benign disease and 22 had lung cancer. Brushings were taken from the right or left nostril and profiled on microarrays, a process that allows researchers to study gene expression changes.The researchers identified 170 genes that were differentially expressed between patients with and without lung cancer. They also found that genes linked to colon cancer and adenocarcinoma, as well as genes that trigger cell division and blood vessel growth, were expressed more heavily in patients with cancer. Genes involved in tumor suppression were also expressed at lower levels in these patients.Earlier studies have used gene expression differences in the bronchial airways to identify lung cancer in its early stages. The researchers relied on those results to design the current study."In this study we used the same principle as we used in our earlier studies of bronchial tissue, only this time, those methods were used to study nasal cells," said study author Christina Anderlind, MD, Instructor of Medicine. "Our hypothesis was that the upper airway epithelium of smokers with lung cancer displays a cancer-specific gene expression pattern, and that this airway nasal gene expression signature reflects the changes that occur in lung tissue."