Did Life on Earth Come from Space?

How did life on Earth get started? Did life on Earth originate on another planet? Either Mars, or in a distant solar system? Could Earth life have spread to have seeded life elsewhere? Let’s see what modern science has to say about the plausibility of panspermia.

Season 5 Episode 4 Length 14:20 Premiere: 12/06/18

Recent Episodes

The Universe Has Been Expanding Since the Big Bang. Just Not How We Thought.

S11 E32 Length 17:40 Premiere Date 07/16/26

The Quantum Experiment That Breaks Time

S11 E31 Length 16:28 Premiere Date 07/02/26

We Thought Black Holes Created Event Horizons. It Might Be the Opposite

S11 E30 Length 17:39 Premiere Date 06/18/26

We’ve Been Looking for Aliens for 70 Years. We've Been Doing It Wrong All Along

S11 E29 Length 20:48 Premiere Date 06/04/26

We Thought Black Holes Ended in Singularities. They Might End In a Frozen Big Bang

S11 E28 Length 14:27 Premiere Date 05/21/26

We Found Galaxies Too Old for the Universe

S11 E27 Length 17:41 Premiere Date 04/30/26

Clips & Previews

Quantum Physics in a Mirror Universe

Preview Length 12:19 Premiere Date 12/17/18

Specials

Black Holes. Explained. For 1.5 Hours.

Length 1:38:18 Premiere Date 12/18/25

Strange Stars

Length 09:58 Premiere Date 03/01/17

Did Dark Energy Just Disappear?

Length 12:22 Premiere Date 02/16/17

The Many Worlds of the Quantum Multiverse

Length 12:52 Premiere Date 02/09/17

The First Humans on Mars

Length 07:51 Premiere Date 02/02/17

Life on Europa?

Length 09:37 Premiere Date 01/18/17

Self-Replicating Robots and Galactic Domination

Length 09:57 Premiere Date 12/25/16

Season 5 Episodes

Show Episodes

Show Clips & Previews

How To Capture Black Holes

S5 E45 Length 12:02 Premiere Date 01/13/20

How To Detect a Neutrino

S5 E44 Length 09:54 Premiere Date 01/06/20

Do Black Holes Create New Universes?

S5 E43 Length 12:24 Premiere Date 12/17/19

The Doomsday Argument

S5 E42 Length 12:50 Premiere Date 12/09/19

Is The Universe Finite?

S5 E41 Length 12:25 Premiere Date 12/02/19

Can You Observe a Typical Universe?

S5 E40 Length 13:36 Premiere Date 11/18/19

Does Life Need a Multiverse to Exist?

S5 E39 Length 13:09 Premiere Date 11/11/19

Why We Might Be Alone in the Universe

S5 E38 Length 12:24 Premiere Date 11/04/19

Is Time Travel Impossible?

S5 E37 Length 12:33 Premiere Date 10/21/19

Loop Quantum Gravity Explained

S5 E36 Length 13:49 Premiere Date 10/15/19

Black Hole Harmonics

S5 E35 Length 13:11 Premiere Date 10/07/19

How Many Universes Are There?

S5 E34 Length 14:03 Premiere Date 09/30/19

Is Pluto a Planet?

S5 E33 Length 14:03 Premiere Date 09/23/19

Could We Terraform Mars?

S5 E32 Length 15:33 Premiere Date 09/16/19

Is Earth's Magnetic Field Reversing?

S5 E31 Length 12:46 Premiere Date 09/03/19

How To Become an Astrophysicist

S5 E30 Length 12:45 Premiere Date 08/26/19

What Happened Before the Big Bang?

S5 E29 Length 10:23 Premiere Date 08/19/19

What Caused the Big Bang?

S5 E28 Length 13:12 Premiere Date 08/06/19

Did Time Start at the Big Bang?

S5 E27 Length 12:30 Premiere Date 07/18/19

The Quantum Internet

S5 E26 Length 11:35 Premiere Date 07/15/19

Thorium and the Future of Nuclear Energy

S5 E25 Length 16:05 Premiere Date 07/01/19

How Black Holes Kill Galaxies

S5 E24 Length 11:20 Premiere Date 06/17/19

The Alchemy of Neutron Star Collisions

S5 E23 Length 11:24 Premiere Date 06/06/19

The Cosmic Dark Ages

S5 E22 Length 12:29 Premiere Date 05/16/19

Why Quantum Computing Requires Quantum Cryptography

S5 E21 Length 13:58 Premiere Date 05/09/19

The Real Science of the EHT Black Hole

S5 E20 Length 11:07 Premiere Date 05/01/19

No Dark Matter = Proof of Dark Matter?

S5 E19 Length 10:37 Premiere Date 04/24/19

The Holographic Universe Explained

S5 E18 Length 14:39 Premiere Date 04/10/19

The Edge of an Infinite Universe

S5 E17 Length 15:16 Premiere Date 04/03/19

Could the Universe End by Tearing Apart Every Atom?

S5 E16 Length 13:21 Premiere Date 03/28/19

Is Dark Energy Getting Stronger?

S5 E15 Length 14:31 Premiere Date 03/20/19

Will You Travel to Space?

S5 E14 Length 12:46 Premiere Date 03/13/19

The Impossibility of Perpetual Motion Machines

S5 E13 Length 12:28 Premiere Date 03/06/19

Secrets of the Cosmic Microwave Background

S5 E12 Length 13:53 Premiere Date 02/20/19

Sound Waves from the Beginning of Time

S5 E11 Length 12:48 Premiere Date 02/07/19

Perpetual Motion From Negative Mass?

S5 E10 Length 14:28 Premiere Date 01/30/19

The Crisis in Cosmology

S5 E9 Length 13:17 Premiere Date 01/23/19

Our Antimatter, Mirrored, Time-Reversed Universe

S5 E8 Length 13:50 Premiere Date 01/16/19

Are Dark Matter And Dark Energy The Same?

S5 E7 Length 13:08 Premiere Date 01/09/19

Why String Theory is Wrong

S5 E6 Length 15:07 Premiere Date 12/20/18

Quantum Physics in a Mirror Universe

S5 E5 Length 12:18 Premiere Date 12/12/18