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What Happened Before the Big Bang?

We define the Big Bang as the extremely hot, dense, rapidly expanding universe that is described by Einstein’s equations. That picture of the universe is very solid down to about a trillionth of a second after the supposed beginning of time. We can make good guesses down to about 10^-30th of a second. But before that?
Season 5 Episode 29 Length 10:23 Premiere: 08/19/19

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Specials

Season 5 Episodes

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

Did Life on Earth Come from Space?
S5 E4 Length 14:20 Premiere Date 12/06/18

'Oumuamua Is Not Aliens
S5 E3 Length 13:04 Premiere Date 11/21/18

Are Virtual Particles A New Layer of Reality?
S5 E2 Length 13:43 Premiere Date 11/14/18

Why String Theory is Right
S5 E1 Length 13:37 Premiere Date 11/07/18

Quantum Physics in a Mirror Universe
Preview Length 12:19 Premiere Date 12/17/18

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