Einstein's Gravity: Not a Force, But Warped Spacetime!

To visualize this, imagine a heavy ball placed on a stretched rubber sheet; it creates a dip. A smaller marble rolling nearby will appear to be 'attracted' to the heavy ball, but it's actually just following the curvature of the sheet. Similarly, planets orbit the Sun not because of an invisible force, but because they are tracing paths along the spacetime 'dents' created by the Sun's immense mass. This groundbreaking insight revolutionized physics, explaining phenomena such as the bending of starlight around massive objects and the expansion of the universe.