Light

Light’s Most Exotic Trick Yet: So Fast it Goes … Backwards?

As if to defy common sense, the backward-moving pulse of light travels faster than light.

Confused? You’re not alone.

“It’s weird stuff,” says Boyd. “We sent a pulse through an optical fiber, and before its peak even entered the fiber, it was exiting the other end.”

“I know this all sounds weird, but this is the way the world works.”