On this episode, Dr. Mark Williams, an experimental particle physicist (and Leena’s husband!), joins us in the home studio. Mark got his MPhys in physics at Oxford University, and his PhD in particle physics at Lancaster University, in the United Kingdom. He moved to the Tevatron Particle Accelerator in Chicago, Illinois to do field work during his PhD. He currently has a Royal Society Fellowship and a tenure-track position at the University of Manchester while based at CERN in Geneva, Switzerland. We talked about his adventures in semi-professional foosball, his work investigating why antimatter matters, and the improbability of our existence.