There are trillions of planets out there. Are any of them sending spaceships our way?

Discover how renowned scientist Hal Puthoff considers the cryptoterrestrial theory as a possible explanation for UFO and UAP phenomena. Explore various hypotheses and the ongoing debate surrounding ...

Jan. 22, 2025 at 9 p.m. on KPBS TV / PBS app + Encore Sunday, Jan. 26 at 9 p.m. on KPBS 2. Unidentified Flying Objects have long captivated the imagination of the public, but for decades most ...

This program examines flying-saucer sightings and how conspiratorial thinking takes hold in the absence of definitive proof.