All Episodes

How Do We Know What Stars Are Made Of?

This how we finally figured them out.

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.

How Black Holes Spin Space Time

If there’s one thing cooler than a black hole it’s a rotating black hole.

How Do Quantum States Manifest In The Classical World?

How do quantum states manifest in the classical world?

Does Quantum Immortality Save Schrödinger's Cat?

If the quantum multiverse is real there may be a version of you that lives forever.

How Decoherence Splits The Quantum Multiverse

Does conscious observation of a quantum system cause the wavefunction to collapse?

Does Consciousness Influence Quantum Mechanics?

There is an idea that consciousness can directly influence quantum systems.

Are Axions Dark Matter?

The axion may explain dark matter.

Are There Infinite Versions of You?

If the universe goes on forever, does that mean there are infinite versions of you?

Hacking the Nature of Reality

An insight by a young scientist in 1925 allowed us a better understanding of space time.

Solving the Three Body Problem

The three body problem is famous for being impossible to solve.

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.

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