Discovering a machine that could somehow produce thrust without releasing propellant would be a game-changer for human space travel. There’s just one problem—such a device would defy the laws of ...
At 6.31am on 8 December 2020, a nurse inserted a needle into Margaret Keenan’s upper left arm. Seconds later, the 90-year-old smiled from behind her mask as onlookers cheered, providing a rare moment ...
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