Radio 4 in Four - Gravitational waves explained in 150 seconds - ÃÛÑ¿´«Ã½ Sounds

Radio 4 in Four - Gravitational waves explained in 150 seconds - ÃÛÑ¿´«Ã½ Sounds
Gravitational waves explained in 150 seconds
Marnie Chesterton explains what physicists have discovered at the LIGO observatory.