The Great Emu War: Unbelievable True Story of Australia’s Hilarious Battle with Emus

Fact: The Eiffel Tower can grow up to 15 cm (6 inches) in height during the summer.

Detail: This phenomenon is due to thermal expansion, where materials expand when heated. The iron structure of the Eiffel Tower absorbs heat from the sun, causing it to expand. 

As a result, the tower's height can increase by up to 15 centimeters on particularly hot days. This fascinating aspect of physics demonstrates how even massive structures can change in response to temperature fluctuations.