StarTalk with Neil deGrasse Tyson

If something is possible, has the universe tried it? Are all physical possibilities inevitable? Neil deGrasse Tyson sits down with theoretical astrophysicist Janna Levin to launch “In Theory,” a new StarTalk series celebrating the weird, wacky theories of the universe and the theorists who chase them. Out on YouTube October 29, 2026!

Are we doing more harm than good in the pursuit of perfection? Neil deGrasse Tyson, comic co-hosts Chuck Nice and Gary O'Reilly explore looksmaxxing, peptides, body composition, and the scientization of health & beauty trends with pharmaceutical scientist & medfluencer Morgan McSweeney, aka Dr. Noc.

Would aliens use the same periodic table as us? Neil deGrasse Tyson and comic co-host Negin Farsad sit down with Kate Biberdorf, aka Kate the Chemist, to tackle fan questions about the chemistry of life, diamonds, how fire works, and spontaneous combustion.

If the multiverse exists, where does our universe end and another begin? Neil deGrasse Tyson and comic co-host Chuck Nice tackle a wide-ranging grab bag of fan questions covering bubble universes, the nature of now, fractals, Hoag's Object, and more.

Why did intelligence evolve in the universe? Neil deGrasse Tyson, Chuck Nice, and Gary O’Reilly explore the nature of intelligence, information theory, consciousness, and whether AI is actually intelligent at all with David Krakauer, evolutionary biologist and president of the Santa Fe Institute.

Why does string theory need ten dimensions? Neil deGrasse Tyson and comic co-host Jordan Klepper sit down with Lara Anderson, string theorist and associate professor of physics at Virginia Tech, to tackle intersecting dimensions, the nature of gravity, and a unified field theory.

What do we do with all this space junk? On this episode, Neil deGrasse Tyson and comic co-host Chuck Nice answer questions about the stuff we put into orbit with astrodynamicist and space environmentalist, Dr. Moriba Jah. Originally Aired July 5th, 2021.

How far did Alan Shepard hit a golf ball on the moon? How many monkeys named Albert have been to space? Neil deGrasse Tyson, comedian Paul Mecurio, and Senior StarTalk Producer Lindsey Walker find out the answers on this Game Show Edition of Startalk celebrating the release of our new book, Lost in Space: 5,000 Facts for Navigating the Universe.

Do the fractal nature of the universe and the human brain have anything to do with each other? Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O’Reilly welcome back Geek-In-Chief Charles Liu, for a grab bag covering deep space travel, fractal mathematics, multiverse theory, and what we might never know about the universe.

What is fundamental in the universe? Neil deGrasse Tyson and comic co-host Chuck Nice welcome back Hakeem Oluseyi to dive deep into cosmology, plasma physics, the origins of life, and some of the most provocative ideas in modern astrophysics.

Is there a limit to how small life can be? Or how big? Neil deGrasse Tyson and Chuck Nice break down why all craters on the moon are round, the scale to life, and why the length of the day isn’t 24 hours.

What if you could reopen your childhood brain? Neil deGrasse Tyson, Chuck Nice, and Gary O’Reilly explore the cutting edge of psychedelic science, critical periods, and what a high octopus can teach us about the human mind with neuroscientist and psychedelics expert Gül Dölen.

Did we discover an exomoon? Neil deGrasse Tyson and Chuck Nice learn about the search for exoplanets with biosignatures, super Earths & mini Neptunes, and whether rogue planets outside of a solar system could harbor life with astrophysicist David Kipping.

Is nuclear power the key to sustainability? With data centers consuming massive amounts of energy, can we keep up? Neil deGrasse Tyson, Gary O’Reilly & Paul Mecurio discuss the physics, safety, and future of nuclear reactors in a world of increasing power demands with nuclear engineer Kathryn Huff. Originally Aired February 21, 2025.

How do you build a telescope to study something you can't see? Neil deGrasse Tyson and Paul Mecurio sit down with Jason Rhodes, senior research scientist at JPL, to explore the Nancy Grace Roman Space Telescope and its search for answers on dark energy and dark matter.

What are the limits of the human mind? Neil deGrasse Tyson, Chuck Nice, and Gary O’Reilly explore sensory perception, dreaming, synesthesia, time, and the flexibility of the human brain with neuroscientist David Eagleman. Why does time seem to slow down during an emergency?

How big can bugs get? Neil deGrasse Tyson and Negin Farsad sit down with entomologist, Jessica Ware, to dig into the extraordinary world of bugs, insects the size of navel oranges, how they invented flying and so much more.

What does it look like beneath the surface of the sun? On this episode, Neil deGrasse Tyson and comedian Chuck Nice discuss the heliosphere, the Parker Solar Probe, and solar storms with heliophysicist Lika Guhathakurta.

Could there be other universes out there? On this episode, Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O’Reilly answer science questions from celebrities like Steven Spielberg, Josh Scherer, Emily Blunt, and more.

Could there be a hidden planet lurking beyond Pluto and Neptune? Neil deGrasse Tyson and comic co-host Chuck Nice tackle a wide-ranging grab bag of fan questions covering Planet 9, galaxy shapes, dark matter, the odds of getting hit by a meteorite, and more!

If scientists discovered that we are not alone, what would they do with that information? Neil deGrasse Tyson and Chuck Nice learn about the search for life, habitability around M stars and more with astrophysics professor and author Aomawa Shields. Originally Aired July 11, 2023.

Does time always move at the same rate? Neil deGrasse Tyson and Chuck Nice break down things you thought you knew about time dilation, gravity assists, the north star, and your zodiac sign.

Is there such a thing as objective truth? Are we living in a post-truth world? Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O’Reilly sit down to build a toolkit for finding the truth in an era of motivated reasoning, misinformation, and alternative facts with science historian and professional skeptic, Michael Shermer.

Could spacetime curve in the opposite direction and produce a repulsive field instead of gravity? Neil deGrasse Tyson and comic co-host Chuck Nice tackle fan questions about photons, heat death, gravitational waves, neutron stars and more with astrophysicist Michelle Thaller.

How do you get entangled particles? Neil deGrasse Tyson and comic co-host Chuck Nice unpack the experimental side of entanglement, superposition, and the quantum underpinnings of our universe with experimental physicist, Sean Hodgman.

What’s the real difference between dreaming and waking consciousness? Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O’Reilly sit down with sleep expert Matt Walker to answer fan questions about the most mysterious thing humans do every single night: sleeping & dreaming.

Is there no single shared "now" for everyone in the universe? Neil deGrasse Tyson and comic co-host Paul Mecurio dive into another grab bag of fan questions about superconducting asteroids, what memories are made of, and if you could ever experience pure unwarped spacetime.

Is it time to update the constellations? On this episode, Neil deGrasse Tyson and comic co-host Matt Kirshen dive into astrophysics, folklore, and our ancient connection to the stars with astrophysicist Moiya McTier, Ph.D.

What type of planets orbit black holes? Neil deGrasse Tyson and comic co-host Negin Farsad sit down with Mordecai-Mark Mac Low to crack open the mysteries of galaxy collisions, dark matter, and the massive planetary systems around black holes.

Did evolution never give us the ability to see reality as it actually is? Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O’Reilly sit down with cognitive scientist Donald Hoffman to explore what neuroscience, evolutionary game theory, and consciousness suggest about the nature of reality itself.

What would happen in a world with too much oxygen? Neil deGrasse Tyson and Chuck Nice break down how rocks actually float, warm blankets, and why oxygen isn’t actually flammable.

Have aliens already secretly visited us? Neil deGrasse Tyson sits down with Steven Spielberg and screenwriter David Koepp to discuss their new film Disclosure Day, alien contact, and why Spielberg believes there’s more out there than meets the eye.

Is the fear of heights innate or learned? Neil deGrasse Tyson, Chuck Nice, and Gary O'Reilly explore taking risks, the neuroscience of fear, and how to overcome it with freestyle rock climber and subject of the film Free Solo, Alex Honnold, and neuroscientist Heather Berlin.

Did the Milky Way used to be a quasar? On this episode, Neil deGrasse Tyson and comic co-host Chuck Nice explore quasars, the high energy universe, and the movie we’re making of the night’s sky with astrophysicist & host of PBS Space Time, Matt O’Dowd.

Why is the past different from the future? Neil deGrasse Tyson and comedian Chuck Nice explore the universe’s deepest questions like why is there anything, how we know we are in the real present, if there could be a unified theory of physics and more with theoretical physicist Sean Carroll.

Are all galaxies redshifting away? Neil deGrasse Tyson and comedian Negin Farsad tackle a grab bag of fan questions covering cosmic infrastructure, redshift, werewolves, gravitational waves, and the nature of time itself.

Can we put the data centers in space? Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O’Reilly map out the future of human habitation, research, and industry in low Earth orbit with Ariel Ekblaw, founder and CEO of the Aurelia Institute.

What would happen to Earth if Jupiter stopped rotating? Neil deGrasse Tyson and Chuck Nice answer a grab bag of fan questions about the challenges with space telescopes, the nature of AI, and whether aliens are funny.

Can we influence the strong nuclear force? Neil deGrasse Tyson and Paul Mecurio answer grab bag questions about sci-fi laser guns, the Roche Limit, how we interact with the fundamental forces, and more!

Is the internet too far gone or can we still fix it? Neil deGrasse Tyson, and co-hosts Negin Farsad and Gary O’Reilly, sit down with Jaron Lanier, Microsoft scientist, and father of virtual reality, to diagnose what went wrong with the web, how it’s changed with AI, and ideas for a new path back.

How bright is the Earth from the moon? Neil deGrasse Tyson and Chuck Nice have fun with the sun’s reflectivity, discuss light pollution, and explore the electromagnetic light spectrum: how does sunscreen work?

What is a starquake? On this episode, Neil deGrasse Tyson and comic co-host Matt Kirshen explore asteroseismology, the sun, and what’s happening on the insides of stars with astrophysicist Conny Aerts.

What are the true limits of life, will we even recognize it when we see it? Neil deGrasse Tyson and comic co-host Chuck Nice explore the beginnings of life on Earth and what they might tell us about life everywhere else with astrobiologist and bacteriologist, Betül Kaçar.

Could you grow your own food on the moon? Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O’Reilly sit down with Kevin Espiritu, the gardening YouTuber behind Epic Gardening, to dig into backyard farming, the future of sustainable food, and what it would actually take to feed yourself on Earth or anywhere else.

What would you actually do if an alien showed up and asked to be taken to your leader? Neil deGrasse Tyson, Paul Mecurio, and astrophysicist Charles Liu explore fan questions about physics of near-light-speed travel, Dark Forest Theory from The Three Body Problem, and whether the universe itself might be conscious.

Are all the galaxies orbiting a superstructure in the middle of the universe? Neil deGrasse Tyson and comic co-host Chuck Nice are reaching into the grab bag to cover questions from absolute zero to the nature of gravity, and much much more.

Are seed oils really that bad? Are people getting enough protein? Neil deGrasse Tyson, Paul Mecurio, & Gary O’Reilly cut through the noise on health myths, food misinformation, and the forces making it harder than ever to eat well with nutrition scientist, Jessica Knurick, PhD.

Could the ingredients for life have arrived on asteroids? Neil deGrasse Tyson and comic co-host Chuck Nice unpack what the sample collected from asteroid Bennu is teaching us about the origins of life itself with Harold Connolly, geologist and mission scientist for OSIRIS-REx.

How did the universe get to be this way? On this episode of StarTalk, Neil DeGrasse Tyson and comic co-host Chuck Nice sit down with theoretical cosmologist, Janna Levin, to help us break down the building blocks of the universe and how it started. Originally Aired March 8, 2021.

What if a microscopic alien lifeform was slowly eating our sun? Neil deGrasse Tyson and Chuck Nice sit down with Andy Weir, the bestselling author of Project Hail Mary, for a deep dive into designing aliens, science fiction, and science behind the book (and the movie.)