In 470 BC, the Greeks claimed that the earth rotated on its own back.
In 1851, French Physicist Leon Foucault showed the world's rotation with the assistance of a pendulum.
There are about 11 locations in India where the Foucault Pendulum is displayed, including the New Parliament building.
The Earth takes 24 hours to complete a rotation with respect to the sun.
The Earth's diameter is 12,714 kilometres (7,900 miles) from the North toward the South Poles and 12,756 kilometres (12,756 miles) via the equator (7,926 miles).