The Foucault Pendulum is named for the French physicist Jean Foucault (pronounced "Foo-koh), who first used it in 1851 to demonstrate the rotation of the earth. It was the first satisfactory ...

Earth’s Rotation Day, observed annually on January 8th, marks the discovery of Earth’s rotation by French physicist Léon ...

As far back as 470 BCE, ancient Greeks speculated the Earth itself moves. In 1851, French physicist Leon Foucault ...

January 8 marks Earth Rotation Day, a lesser-known but scientifically significant day that celebrates the rotation of our planet on its axis. This fundamental phenomen ...

The change in direction of the swinging brass ball hanging from a steel cable is almost indiscernible. Called a Foucault (pronounced “foo-KOH”) pendulum after its designer, French physicist ...