All Episodes

Why We Might Be Alone in the Universe

Why does it appear, that humanity is the lone intelligence in the universe?

Is Time Travel Impossible?

Is Time Travel Impossible?

Black Hole Harmonics

We’ll explore the papers that claim to have detected black hole harmonics.

How Many Universes Are There?

The universe is big, but it’s peanuts compared to the eternally inflating multiverse

Is Pluto a Planet?

You know what a planet is, right? A big round thing that orbits a star. Uh, not so fast.

Could We Terraform Mars?

Could we terraform Mars?

Is Earth's Magnetic Field Reversing?

Is Earth's Magnetic Field Reversing?

How To Become an Astrophysicist

Are you thinking about becoming (or ever just wondered how one becomes) an Astrophysicist?

What Happened Before the Big Bang?

We actually have a pretty good idea of what might have happened before the Big Bang.

What Caused the Big Bang?

What Caused the Big Bang?

Did Time Start at the Big Bang?

Did Time Start at the Big Bang?

The Quantum Internet

The Quantum Internet

Thorium and the Future of Nuclear Energy

Thorium and the Future of Nuclear Energy

How Black Holes Kill Galaxies

It turns out black holes may be responsible for ending star formation across the galaxy.

The Alchemy of Neutron Star Collisions

Many heavy elements were produced in a spectacular event: the collision of neutron stars.

The Cosmic Dark Ages

There was a time before the first star ignited. A time we call the cosmic dark ages.

Why Quantum Computing Requires Quantum Cryptography

Quantum computing is cool, but you know what would be extra awesome - a quantum internet.

The Real Science of the EHT Black Hole

The Real Science of the EHT Black Hole

No Dark Matter = Proof of Dark Matter?

We’ve been failing to detect dark matter for decades.

The Holographic Universe Explained

The Holographic Universe Explained

The Edge of an Infinite Universe

Have you ever asked “what is beyond the edge of the universe?”

Could the Universe End by Tearing Apart Every Atom?

Of all the unlikely ends of the universe, the Big Rip has to be the most spectacular.

Is Dark Energy Getting Stronger?

The power of Dark Energy may be increasing as the universe ages.

Will You Travel to Space?

Will You Travel to Space?

Secrets of the Cosmic Microwave Background

Secrets of the Cosmic Microwave Background

Sound Waves from the Beginning of Time

Sound Waves from the Beginning of Time

Perpetual Motion From Negative Mass?

Challenge question: if 1kg of apples is $5 and 2kg is $10, how much is -1kg of apples?

The Crisis in Cosmology

The hubble constant--the rate of expansion of our universe--has consumed astronomers.

Our Antimatter, Mirrored, Time-Reversed Universe

The foundations of quantum theory rests on its symmetries.

Are Dark Matter And Dark Energy The Same?

Astronomers are the worst at naming things. Dark energy AND dark matter?

Why String Theory is Wrong

Why String Theory is Wrong

Did Life on Earth Come from Space?

Did life on Earth originate on another planet?

'Oumuamua Is Not Aliens

It’s never aliens … until it is. So let’s talk about ‘oumuamua.

Are Virtual Particles A New Layer of Reality?

Let me tell you a story about virtual particles. It may or may not be true.

Why String Theory is Right

Some see string theory as the one great hope for a theory of everything.

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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