Astronomers want to build telescopes to look even farther back in time than webb can like before the first light of the universe. To do this, you would build a giant radio telescope on the far side of the moono this is the side that never faces the earth. We can't see with light that part of the universe, but there are telescopes that can detect things that are not light. I talk to paulhertz at nassau and he tells a story about what scientists think happened before that first light ofthe universe.