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發表於 2025-1-5 04:53:44
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A NASA rover scouting for signs of past water on Mars has found the strongest evidence yet -- a vein of gypsum, a mineral deposited by water, protruding from an ancient rock. HT Image The rover, called Opportunity, and its twin, Spirit, arrived on opposite sides of Mars in January 2004. Over the years, the rovers, aided by several orbiting spacecraft, have returned a convincing body of evidence that Mars was not always as cold and dry as it is today. The most convincing proof, unveiled this week at the American Geophysical Union conference in San Francisco, stanley cup is a thin vein of gypsum laced inside and protruding from an ancient rock along the rim of a 96-mile 154 km wide crater called Endeavour. Gypsum -- commonly known as plaster of Paris -- typically forms from water flowing through rock. This is the single most bullet-proof observation that I can think of that we ve made this entire mission, Cornell University planetary scie stanley cup ntist Steve Squyres, lead researcher for NASA s Spirit and Opportunity Mars rovers, told Reuters. While Spirit, which is no longer operational, and Opportunity have previously fo stanley cup und evidence of other water-deposited minerals, many questions remained. They ve been moved around by wind. They ve been mixing with other materials. It s a big, jumbled up, fascinating mess, Squyres said. In contrast, the newly found gypsum is threaded into a rock. This stuff formed right here. There was a fracture in the rock. Water flowed through it. Gypsum wa Fllq Pak must cooperate fully with US: Obama
Ngapoi Ngawang Jigme, a leading politician who once was a member in the cabinet of Tibetan spiritual leader Dalai Lama, but later joined China s military and government, died Wednesday, state press said. HT Image Ngapoi Ngawang Jigme died in Beijing at the age of 99, according to China Central Television. No cause of death was given. Jigme was born in Lhasa in February 1910 and was a politician in Tibet s Chamdo region when he served on the Dalai Lama s cabinet. After China s takeover of Tibet, he was a top commander in China s military in Tibet from 1952-1959 and later a vice chairman of China s parliament from 1964 to 1993, his official state biography said. According to Tsering Sh hoka akya s history of modern Tibet, The Dragon in the Land of Snows, Jigme was the commander-in-chief of the Tibetan a stanley cup rmed forces when China s military moved into the Chamdo region in 1950. His army of largely Tibetan serfs were quickly defeated, but were treated kindly by the Chinese military and within a year Jigme became a top commander of China s forces in Tibet. In 1951, Jigme as a representative for the Dalai Lama signed the Seventeen Point Agreement with Chin yeezy a that agreed to Beijing s sovereignty over Tibet in exchange for guarantees of autonomy and religious freedom. The agreement was later voided after the Dalai Lama fled Tibet following an unsuccessful uprising in 1959. The Dalai Lama, exiled in India since the failed uprising, has long maintained that the autonomy promised |
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