The Eiffel Tower grows in summer.

Wacky WorldScience

Iron expands in the heat, so the tower can grow by up to about 15 cm on hot days and shrink again in winter.

Another wacky fact → All facts

Explore more Science facts

Sound travels about four times faster in water than in air.Diamonds and pencil “lead” are made of the same element.A ‘jiffy’ is a real unit of time.