How Do We Measure the Speed of Light?

How do you know what the speed of light is? Well, we can measure it by looking at protons. But there's more kinetic energy in these particles, but they're not moving much faster aches the speed oflight. So how does that work out for us? We asked our interns to tell us and some surprising answers came back. If you'd like to participate for a future podcast, please don't be shy!