Caltech's Mike Brown and Konstantin Batygin discuss their new paper, the latest evidence for Planet 9, and why they believe their hunt may soon be over.
Casey Dreier, the chief of space policy at The Planetary Society, analyzes what the incoming Trump administration could mean for NASA’s funding, human spaceflight, and its Science Mission Directorate.
Morgan Cable and Hiro Ono from NASA's Jet Propulsion Laboratory join Planetary Radio to discuss the Exobiology Extant Life Surveyor (EELS) robot concept.