stackyFACTSThe world's most famous set of tangled stairs was born in a military shipyard.
The world's most famous set of tangled stairs was born in a military shipyard. An engineer was trying to develop tension springs that could keep sensitive ship instruments perfectly level while crashing through rough ocean waves. He accidentally knocked one of his prototype springs off a shelf and watched in utter fascination as it delightfully 'walked' down a stack of books. The navy hated it, but children absolutely loved it.
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