ATLAS Experiment CERN

At the very beginning of the Universe, equal amounts of matter and antimatter existed.

If matter and antimatter were exact mirror images of each other, they would have completely annihilated to leave only energy.

But why was some of the matter left over to create galaxies, the Solar System with our beautiful planet, and us?

ATLAS will explore the tiny difference that exists between matter and antimatter.

What is antimatter?

Antimatter in Angels and Demons


An anti-person meeting an ordinary person

The Unknown Dark Matter Mass Extra Dimensions Antimatter New Forces Standard Model