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China finishes world’s largest telescope

Gorkha Post

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BEIJING — China has wrapped up the world’s largest radio telescope, which it will use to investigate space and hunt for extraterrestrial life, state media says.

The 500-meter Aperture Spherical Telescope, or FAST, is the size of 30 soccer fields and has been hewn out of a mountain in the south-western province of Guizhou.

Scientists will now start debugging and trials of the telescope, Zheng Xiaonian, deputy head of the National Astronomical Observation under the Chinese Academy of Sciences, which built the telescope, told the official Xinhua news agency.

The 1.2-billion yuan ($240 million) radio telescope will be a global leader for the next one to two decades, Mr Zheng added.

The telescope, which has taken about five years to build, is expected to begin operations in September.

Advancing China’s space program is a priority for Beijing, with President Xi Jinping calling for the country to establish itself as a space power.

China’s ambitions include putting a man on the moon by 2036 and building a space station, work on which has already begun.

China insists its program is for peaceful purposes, but the US Defence Department has highlighted China’s increasing space capabilities, saying it is pursuing activities aimed to prevent adversaries from using space-based assets in a crisis.

Reuters

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Science & Technology

Researchers successfully grow human cells in sheep embryos

Raghu Kshitiz

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Researchers successfully grow human cells in sheep embryos. Represenatational image

KATHMANDU — In an incredible development that could possibly go a long way in medical practices, scientists in California are working on a way to reduce organ transplants and rejections: Growing embryos in sheep and pigs containing human patients’ cells.

In a transplant breakthrough, scientists at the University of California said they have achieved sheep embryos in which around one in every 10,000 cells was human, according to UPI report.

The researchers presented preliminary findings Saturday at the American Association for the Advancement of Science’s annual meeting in Austin, Texas.

The new finding paves way for genetically tailoring the organs to be compatible with the immune system of the patient receiving them, thus removing the possibility of rejection, the report said.

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The hybrid embryos contain both human and sheep cells and were created in an early step toward growing human organs in farm animals before transplanting them into patients.

Last year, the same researchers introduced human stem cells into early pig embryos, producing embryos with about one in every 100,000 cells being human.

The experiment began with Hiro Nakauchi, from the University of Tokyo, who grew a mouse with a rat pancreas and a rat with a mouse pancreas.

When cells from the rat-grown mouse pancreas were transplanted into a diabetic mouse, they made enough insulin to cure the condition without being rejected.

Mice and rats are different types of rodents with the former having thin slightly hairy tails, while rats have thicker hairless scaly tails.

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“The next step was to move into large animals,” Nakauchi said. Since this was prohibited in Japan, he moved to the Stanford University in the US.

Nakauchi’s rodent work has demonstrated that you can “grow organs in a different species and cure a disease without [suppressing the immune system],” added co-researcher Pablo Ross, Professor at from the University of California, Davis.

“We are working together to translate the technology into humans, to solve the terrible shortage of organs for transplantation. In the US, 20 people die every day because they cannot get the organs they need,” Ross explained.

With Agency Inputs

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