 In that regard, it also is a way of looking back in time. So you have to understand if the Big Bang were real and had a start point, that light source is now hitting the James Webb Telescope, and that's what we're starting to record as being very old objects, light galaxies. And that's how they can measure how old these galaxies are, is just how far back they can see, because light is kind of a time machine. Fascinating, Cheryl.