In 1851, a French physicist suspended a metal ball from a 67-metre wire, and it became one of the first direct proofs that the Earth rotates
In 1851, a French physicist suspended a metal ball from a 67-metre wire, and it became one of the first direct proofs that the Earth rotates
In 1851, a French physicist suspended a metal ball from a 67-metre wire, and it became one of the first direct proofs that the Earth rotates
