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Scientists Heard the Fireball No Camera Could See
When a fireball streaked across the Alaska sky in broad daylight, the cameras meant to capture it saw nothing useful. Undeterred, scientists turned to sound waves too low for human ears and faint tremors picked up by earthquake sensors, piecing together an extraordinary account of the object's final seconds. What they discovered points to a surprising new way of tracking dangers falling from space, whether we can see them coming or not.
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