PBS Space Time

Blast off into the cosmos with astrophysicist Matt O'Dowd.


  • Does Gravity Require Extra Dimensions?

    Does gravity require extra dimensions?
  • Mapping the Multiverse

    This is a map of the multiverse.
  • How Luminiferous Aether Led to Relativity

    How Luminiferous Aether led to Relativity.
  • How We Know The Universe is Ancient

    How do you learn the age of the universe when there’s no trace left of its beginnings?
  • Will Wormholes Allow Fast Interstellar Travel?

    When do we get to wormhole ourselves out of here?
  • Was the Milky Way a Quasar?

    Recently we discovered that its violent past was much more recent than we thought.
  • How We Know The Earth Is Ancient

    How can we be sure about timescales so far beyond the capacity for human intuition?
  • What’s On The Other Side Of A Black Hole?

    Normal maps are useless inside black holes.


  • Did Dark Energy Just Disappear?

    Did all of dark energy just vanish?
  • The Many Worlds of the Quantum Multiverse

    Is our universe a definitive single reality? Can we even answer that question?
  • The First Humans on Mars

    What might a budding Mars colony look like?
  • Black Holes from the Dawn of Time

    Primordial black holes may be lurking throughout our universe.
  • Life on Europa?

    The can the Hubble Telescope tell us about the potential for life on Europa?
  • Quantum Entanglement (The Bohr-Einstein Debate)

    Let's settle the quantum entanglement once and for all.
  • Self-Replicating Robots and Galactic Domination

    Will self-replicating robots reshape our galaxy?

About PBS Space Time

PBS Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth. Host Matt O'Dowd breaks down the both the basic and incredibly complex sides of space and time.