The universe ought to be swimming with antimatter, and scientists aren't quite sure where it all went. Paul Sutter, community outreach coordinator at the Center for Cosmology and AstroParticle Physics, explains the conundrum.
It's a cosmic whodunit.
Paul M. Sutter is an astrophysicist at The Ohio State University, host of Ask a Spaceman and Space Radio, and author of Your Place in the Universe. Sutter contributed this article to Space.com's Expert Voices: Op-Ed & Insights.