A single dose of stem cells can help older people with frailty build up their endurance. Plus, how to successfully make a career pivot and what ‘adulthood’ really means.
Nature, Published online: 25 February 2026; doi:10.1038/d41586-025-04161-7，更多细节参见Line官方版本下载
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Their premature departure left Chris Williams, who arrived on a Russian Soyuz spacecraft in November 2025, as the only American astronaut at the station for a month until Crew-12 arrived on Feb. 14.，推荐阅读heLLoword翻译官方下载获取更多信息
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