Physics
Is the Eiffel Tower taller in summer?
The Eiffel Tower is up to 15 cm taller in summer than in winter, because its iron expands in the heat.
Source: Société d'Exploitation de la Tour Eiffel.
Context
Yes, by up to 15 cm. The tower is iron, and iron expands when it warms. A summer afternoon stretches the whole structure a little; a cold winter night pulls it back.
The tower's operating company publishes the figure. The sun also heats one side more than the other, so the top leans very slightly away from the sun during the day.
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