NASA’s Bhavya Lal returns to explain the challenges and big advantages of nuclear propulsion in space.

The Pentagon has released its assessment of Unidentified Aerial Phenomena. Casey Dreier and science journalist Sarah Scoles talk about what’s behind the renewed interest in UFOs and Sarah’s book, They Are Already Here.

The White House’s proposed 2022 NASA budget is almost entirely great news, as is the announcement that two complementary orbiters will explore Venus.

NASA chose SpaceX’s Starship as the sole winner of its human lunar lander development contract in a move that may also take us closer to Mars.

It looks like former senator Bill Nelson will be NASA’s next administrator. Casey Dreier and Mat Kaplan talk about his nomination and other developments in Washington D.C., including The Planetary Society’s very successful Day of Action.

Elon Musk’s SpaceX nearly failed 15 years ago as it struggled to launch its first rocket. Eric Berger has written about this challenging early era and how it helped create today’s successful, innovative company.

Matt Hourihan of the American Association for the Advancement of Science joins Casey Dreier for a deep dive into the U.S. government’s funding of science research and development.

Casey Dreier and our special guest, former National Space Council chief of staff Jared Zambrano-Stout, consider the troubling events at the U.S. Capitol in this special episode.

Space historian Teasel Muir-Harmony argues in her fascinating new book that the Apollo lunar program was promoted as a triumph of, not for, all mankind.

With the United States election over, Casey Dreier and Mat Kaplan welcome back Planetary Society Chief of D.C. Operations Brendan Curry for a review of what may be in store for the U.S. space program.