Alien Sightings with David Spergel

Are alien spacecraft here on Earth? Neil deGrasse Tyson and comedian Chuck Nice discuss the UAP hearings, unexplained cosmic phenomena, dark matter, and more with astrophysicist and NASA UAP chair David Spergel. NOTE: StarTalk+ Patrons can listen to this entire episode commercial-free here:  https://startalkmedia.com/show/alien-sightings-with-david-spergel/ Thanks to our Patrons David Anderson, Paul Balchin, Gary Droege, Antonin Bukovsky, Bill Bailey, Nathan Ramsey, Allan Schwartz, Tom Voyles, Curt Helvey, Walquiria Fontanez, Peg & Rick, Brandon, DJ Thuggy, Lorenzo Olivera, James Cobb, devon, Peter Čerešník, Rick, VICTOR HERNANDEZ, Pohev, Terry Burke, Barbara Guerra-Torres, Tyler Provencher, and Mariann for supporting us this week. Subscribe to SiriusXM Podcasts+ on Apple Podcasts to listen to new episodes ad-free and a whole week early.