Since the beginning of this video, millions upon millions of particles have already passed through your body. Among them is a kind of fundamental particle, called a muon, that comes from outer space. But instead of letting them slip by unnoticed, scientists are using them to look inside large structures here on Earth.

Originally released by Inside Science, 2018. Streaming video file encoded with permission for digital streaming by Infobase on January 03, 2019.

Muons - Outer Space Particles Help Image Things On Earth (3:31);