Science and U: Did the Universe Have a Beginning?

Physicist Dr. Weiping Yu returns with Science and U to comment on the new images of an enormous ‘swiss cheese’ bubble surrounding the Earth. How do superbubbles form? What really is this thing that we call gravity? Dr. Yu also comments on the puzzling formation of planets, stars, and supermassive black holes; whether the universe had a beginning; the discovery of a new type of quantum entanglement; and more.