Big questions: missing antimatter

The imbalance between matter and antimatter in the universe is one of the big mysteries of modern physics. Both should have existed in equal amounts just after the big bang. But when we look out into the cosmos, we see only matter and no antimatter. US CMS Education and Outreach Coordinator Don Lincoln explains this conundrum, and what physicists are doing to solve it, in a new video. View the video. Video: Fermilab