What on Earth is Wrong With Gravity?

Particle physicist and ex D:Ream keyboardist Dr. Brian Cox believes that the answer to the meaning of the universe lies in gravity. On a road trip across the USA, Brian fires lasers at the moon in Texas and goes wild in the desert in Arizona. He encounters the bending of space and time at a maximum security military base and tries to detect ripples in our reality in the swamps of Louisiana. By BBC Horizon.