Francis Ngannou is a professional mixed martial artist competing in the heavyweight division of the UFC. When he's not busy training for his next fight, he works to empower the youth of his native Cameroon through the Francis Ngannou Foundation. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Fahim Anwar is a stand-up comic, actor, and former aerospace engineer. In addition to starring in his own solo comedy special, "There's No Business Like Show Business" on available on YouTube, Anwar is also a founding member of the sketch comedy group Goatface, and has appeared in several comedy films and tv series. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Ali Siddiq is a stand-up comic and writer who initially developed his comedic talents during a six-year stint behind bars. Now a successful headliner, Siddiq spends his time offstage volunteering to meet the needs of his Houston, Texas community. His most recent special is "It's Bigger Than These Bars", filmed live at Bell County Jail in Texas. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Mark Smith is an airline pilot, mixed martial arts referee, judge, and trainer, and corporate health and wellness advocate. Prior to his career in the private sector, Smith served his country as an Air Force F-16 fighter pilot, with tours at NASA, the White House, and the elite flying group the Thunderbirds. https://www.instagram.com/markdsmithmma Learn more about your ad choices. Visit podcastchoices.com/adchoices

Jamar Neighbors is an actor and stand-up comedian. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Brendan Schaub is a comedian, actor, and retired mixed martial artist. He is the host of the The Fighter and the Kid and Below the Belt podcasts. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Justin Wren is a professional mixed martial artist, humanitarian aid-worker, and founder of Fight for the Forgotten: a non-profit benefiting the Mbuti Pygmy people of the Congo. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Brian Redban is a comedian, producer, and co-host of the podcast and live-streaming YouTube show Kill Tony, and founder of the Deathsquad podcast network. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Scientist Lex Fridman researches human-centered artificial intelligence and autonomous vehicles at MIT, and is also the host of the Lex Fridman podcast. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Tulsi Gabbard is a Former United States Representative, presidential candidate, and Iraq War veteran. Currently, she serves as the leader of Tulsi Aloha, a political action committee. Learn more about your ad choices. Visit podcastchoices.com/adchoices

World Wrestling Entertainment Hall of Famer Mark "The Undertaker" Calaway is a thirty-year veteran of the sports entertainment industry, and widely considered one of the best professional wrestlers of all time. Now retired from the ring, his story is the subject of the wrestling retrospective "Undertaker: The Last Ride". Learn more about your ad choices. Visit podcastchoices.com/adchoices

Travis Walton's personal story of alien abduction inspired the science-fiction film "Fire in the Sky", and has been featured in multiple documentaries devoted to the subject of UFOs. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Professor Avi Loeb is a theoretical physicist whose areas of professional interest include cosmology and astrophysics. His new book, "Extraterrestrial: The First Sign of Intelligent Life Beyond Earth", proposes that 'Oumuamua, the interstellar object that passed through our solar system in 2017, may have been the creation of an alien intelligence. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Ira Glasser is a former director of the American Civil Liberties Union and a lifelong defender of every citizen's right to free speech. He is the subject of the 2020 documentary "Mighty Ira", available now on streaming video. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Yannis Pappas is a stand-up comedian, actor, and writer. He is the co-host, with Chris Distefano, of the "History Hyenas" podcast, and host of the "Long Days" show on YouTube. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Professor Carl Hart is an expert in the fields of neuropsychopharmacology and behavioral neuroscience. A longtime champion for evidence-based drug policies, Hart has written a number of influential books in the field. His newest is "Drug Use for Grown-Ups: Chasing Liberty in the Land of Fear". Learn more about your ad choices. Visit podcastchoices.com/adchoices

Filmmaker Bryan Fogel's "Icarus" won the Academy Award for Best Documentary Feature in 2018. His newest documentary, "The Dissident", is an investigation of the death of Saudi Arabian "Washington Post" journalist Jamal Khashoggi, murdered at the hands of his own government. "The Dissident" is now available On Demand and in theaters. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Wrestler Jordan Burroughs is an Olympic Gold medalist, four-time World Champion, six-time World Cup champion, three-time Pan American Games Gold medalist and four-time Pan American champion. Learn more about your ad choices. Visit podcastchoices.com/adchoices

Phil Demers is a former professional marine mammal trainer and subject of the new documentary "The Walrus and the Whistleblower". Learn more about your ad choices. Visit podcastchoices.com/adchoices

Dr. Mark Gordon is an expert in the field of neuroregenerative medicine and the treatment of Traumatic Brain Injuries. SFC Andrew Marr is a Green Beret, co-founder of the Warrior Angels Foundation, and author of "Tales from the Blast Factory". He is also one of the subjects in the new documentary "Quiet Explosions" available now. Video credit: "Coronavirus Epidemic Update 34: US Cases Surge, Chloroquine & Zinc Treatment Combo, Italy Lockdown" by MedCram - Medical Lectures Explained CLEARLY - https://youtu.be/U7F1cnWup9M Learn more about your ad choices. Visit podcastchoices.com/adchoices