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In 1943, the US Navy tried to make ships invisible with the Philadelphia Experiment, accidentally creating the world's first electromagnetic pulse that knocked out power across three states.
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Science Gone WrongSep 04, 2026

In 1943, the US Navy tried to make ships invisible with the Philadelphia Experiment, accidentally creating the world's first electromagnetic pulse that knocked out power across three states.

The Navy tried making ships invisible and blacked out three states. Philadelphia Experiment used massive electromagnetic generators. Intended to bend light around battleships. Created uncontrolled electromagnetic pulse instead. Power grids failed from Pennsylvania to Virginia. Military's first accidental cyberattack happened 40 years early.

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