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A little wonder, every day

Sunlight makes the Eiffel Tower lean slightly

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Warm metal expands, moving the tower’s top.

Listen to fact0:00 / —

The Sun heats one side of the Eiffel Tower more than the others. The warmth makes the iron expand slightly, so the top leans and can trace a circle about 15 centimeters across during the day. The tower’s height itself changes by only a few millimeters, not by more than 10 centimeters.