How did the galaxies form and how can we learn about them? Professor Erica Nelson of the University of Colorado, Boulder tells us how we use the James Webb Space Telescope (JWST) to look back in time and learn about the initial formation of structure in the universe.

How do stars explode? It turns out there's more than one way, and Professor Abigail Polin has discovered a totally new way that stars can end their lives. We talk with Professor Polin about how that works and how scientists look at a supernova to figure out what caused the explosion.