An orbiting disco ball gave Einstein’s theory its most precise test yet

Albert Einstein’s general theory of relativity predicts that a rotating mass like the Earth pulls the fabric of space and ...
Interesting Engineering

Hypersonics: US based rotating detonation rocket engine company to scale production

A compact rocket engine that uses a continuously rotating detonation wave has attracted $91 million in fresh funding.

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

Most of us accept that the Earth rotates because we have been taught it since childhood. We have seen satellite images, ...