Dr. Katie Mack, a theoretical astrophysicist, walks #1 New York Times bestselling author John Green through the history of the entire universe - including the parts that haven’t been written yet.
| Title | Date published | ||
| Ep. 1: The First Fraction of a Second | 2024-04-24 | ||
| Trailer: The Universe with John Green and Dr. Katie Mack | 2024-04-10 |