ÃÛÑ¿´«Ã½

Available for over a year

World renowned physicist Stephen Hawking has died aged 76. He was a pioneering scientist, known for his groundbreaking discoveries and his research into the black hole. But what do his theories actually mean? We did a quick physics lesson with our Science Correspondent, James Gallagher. (Photo: Stephen Hawking. Credit: Niklas Halle'n/AFP/Getty Images)