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China's Coldest Material
Chinese researchers have set a record by cooling a cloud of rubidium atoms to 9.7 picokelvin above absolute zero. The experiment was conducted in a laboratory aboard the Mengtian module of China’s space station, and its results were published in *Science*. Using laser traps, the team maintained and observed the ultracold state for seven seconds, taking advantage of weightlessness, which allows atoms to be cooled and confined for longer than on Earth. The experiment could help advance the study of quantum phenomena and the development of highly precise atomic clocks, navigation systems, and quantum technologies.
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