How do you prove a black hole exists? During her March visit to WashU, the 2020 Nobel Prize in Physics recipient will explain how decades of precise measurements turned the idea of a supermassive black hole at the center of our galaxy into scientific certainty.
The Payload for Ultrahigh Energy Observations (PUEO) has successfully completed its inaugural flight, launching from the NASA Long Duration Balloon Facility on the Ross Ice Shelf in Antarctica on December 19, 2025.