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France seeks to build reusable rocket, make up for “bad choices” in the past
Enlarge / French Finance Minister Bruno Le Maire speaks during a visit to the aerospace company ArianeGroup in Vernon, northern France, on December 6, 2021. (credit: ERIC PIERMONT/AFP via Getty Images) On Monday French Finance Minister Bruno Le Maire announced a plan for Europe to compete more effectively with SpaceX by developing a reusable rocket on […]
Why kids matter in the quest to stamp out COVID-19
Enlarge (credit: Getty Images) Last December, when Caleb Chung, a 12-year-old in Durham, North Carolina, first heard from his dad that he might be eligible for a local clinical trial of a COVID-19 vaccine, his reaction was a little muted. He was “interested,” he tells me over Zoom. Not excited, exactly, not jumping for joy […]
The beating heart of a swimming robot
Enlarge (credit: Lee et al.) Most muscles in our bodies only act in response to incoming nerve signals, which have to trigger each individual muscle cell to contract or relax. But heart muscle is different. The impulses that trigger contraction in heart muscle are passed from one muscle cell to its neighbors, leading to a […]