Space-time is a fundamental concept in modern physics, central to Einstein’s theory of relativity. It combines the three dimensions of space with the one dimension of time into a four-dimensional continuum. This unified model helps explain how gravity works and how objects move through the universe. In relativity, space and time are not separate entities but are interwoven into a single fabric. Massive objects, like stars and planets, cause this fabric to curve, and this curvature is what we per

Astronauts on the ISS age more slowly than us here on Earth. We challenged Dr Devika Kamath to explain time dilation in an elevator ride. | ABC Science