 A star in space, that is the radiation that ultimately culminates in skin cancer if it gives enough exposure to your skin, mutates enough of your cells. But that's part of what's going on here, is can you harness that, can you take that even further and target it so that it's not causing wanton destruction, it's targeted destruction of the cells in the human body that are dangerous. So it's a really clever different technique. While we're on clever, I've got a game for you to play here. Will you come and play the first of our games? It involves lasers and mirrors. Challenge accepted. Come with me.