The Foucault pendulum which was displayed for many years in the Smithsonian's National Museum of American History was removed in late 1998 to make room for the Star-Spangled Banner Preservation ...

Called a Foucault (pronounced “foo-KOH”) pendulum after its designer, French physicist Léon Foucault, the device was conceived in 1851 to demonstrate the rotation of the Earth. This pendulum ...

Léon Foucault's name is synonymous with his famous pendulum experiment, which proved for the first time that the Earth rotated. However, his contributions to science went well beyond his pendulum - ...