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Nasa administrator Jared Isaacman told a media briefing that he was adding an extra step to the Artemis programme because he did not want such long gaps between launches.
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Wes Streeting, Health Secretary in England, says he wants screening in place but only if it's "backed by evidence".
James also hears from Catherine and Jo, who have lived with ME for many years. They describe their diagnostic journeys and how they manage their symptoms in their daily lives.
Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10126-1