What can space teach us about the laws of physics? Space is huge and complicated. This is a challenge, but also gives us the ultimate physics lab. Francesca Day explores this further. Light from the beginning of the universe is hidden in the night sky. In space we can see physics at much higher energies and over much larger distances than we could ever manage on Earth. Space is also a great place to look for new particles – it produces and accelerates them for us and then drops them right on our heads. I will talk about how we can use space to discover new physics and new particles.