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Nature 446, 357 (22 March 2007) | doi:10.1038/446357a; Published online 21 March 2007

A jump that would prove Newton wrong

Philip Ball

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A law of physics could break down on the equinox.

On 21 March — the spring equinox — something very strange may have happened. In two particular places on Earth, objects might have started to move without any force acting on them.