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What the Heck is Dark Matter?

85% of the mass of our universe is made up of dark matter--a type of matter that we cannot see or detect, but without it, galaxies would not exist and the universe as we know it would be very different. What is dark matter? Where is dark matter? How can we find dark matter?

Season 2016 Episode 23 Length 08:55 Premiere: 09/08/16

Recent Episodes

How Hard is it to Run a Marathon?

S2016 E21 Length 18:18 Premiere Date 10/13/16

Will Bananas be Wiped Out By Disease?

S2016 E19 Length 06:05 Premiere Date 10/06/16

What Does it Take to be a Professional Wrestler?

S2016 E25 Length 12:48 Premiere Date 09/29/16

Why Does Charles Trippy Put His Life on the Internet?

S2016 E15 Length 08:10 Premiere Date 09/22/16

How Hackers are Making the World Safer

S2016 E8 Length 10:18 Premiere Date 09/15/16

What the Heck is Dark Matter?

S2016 E23 Length 08:55 Premiere Date 09/08/16

Season 2016 Episodes

Show Episodes

Show Clips & Previews

The Complicated History Of The Confederate Flag

S2016 E31 Length 09:42 Premiere Date 01/24/16

The Lasting Impact of Women in The Civil War

S2016 E30 Length 07:58 Premiere Date 02/12/16

The Secret Life and Art of Henry Darger

S2016 E29 Length 08:32 Premiere Date 09/01/16

Why Do We Like To Be Afraid?

S2016 E28 Length 07:59 Premiere Date 05/05/16

Can We Make a Pet Dinosaur?

S2016 E27 Length 08:48 Premiere Date 06/16/16

Inside Biosphere 2

S2016 E26 Length 14:30 Premiere Date 06/02/16

What Does it Take to be a Professional Wrestler?

S2016 E25 Length 12:48 Premiere Date 09/29/16

What is the Power Grid?

S2016 E24 Length 09:54 Premiere Date 07/28/16

What the Heck is Dark Matter?

S2016 E23 Length 08:55 Premiere Date 09/08/16

Facing a Fear of Heights

S2016 E22 Length 10:30 Premiere Date 05/19/16

How Hard is it to Run a Marathon?

S2016 E21 Length 18:18 Premiere Date 10/13/16

Earthships: Living Off The Grid

S2016 E20 Length 09:52 Premiere Date 08/18/16

Will Bananas be Wiped Out By Disease?

S2016 E19 Length 06:05 Premiere Date 10/06/16

The Next Great Moon Race

S2016 E18 Length 10:24 Premiere Date 06/30/16

Why We Need a Revolution In Energy Storage

S2016 E17 Length 08:56 Premiere Date 08/04/16

Can We Find an Earth-Like Planet?

S2016 E16 Length 12:16 Premiere Date 07/07/16

Why Does Charles Trippy Put His Life on the Internet?

S2016 E15 Length 08:10 Premiere Date 09/22/16

How to Start a Fire the Old Fashioned Way

S2016 E14 Length 12:57 Premiere Date 06/23/16

Why Are Roller Coasters Awesome?

S2016 E13 Length 06:20 Premiere Date 05/12/16

Craig Goes To Space! . . . Camp!

S2016 E12 Length 10:33 Premiere Date 07/21/16

The Rare Albino Squirrels of Olney, Illinois

S2016 E11 Length 10:17 Premiere Date 06/09/16

Can You Build A Warp Drive (In A Garage)?

S2016 E10 Length 12:23 Premiere Date 07/14/16

Visiting Area 51

S2016 E9 Length 11:34 Premiere Date 08/25/16

How Hackers are Making the World Safer

S2016 E8 Length 10:18 Premiere Date 09/15/16

What's it Like to Go Skydiving?

S2016 E7 Length 09:59 Premiere Date 05/26/16

Is Nuclear Power Good Or Bad?

S2016 E6 Length 12:00 Premiere Date 08/11/16

What if The Civil War Were Tweeted?

S2016 E5 Length 07:02 Premiere Date 01/20/16

From the Abolitionist Movement to #BlackLivesMatter

S2016 E4 Length 09:48 Premiere Date 03/03/16

How the US Government Became So Big

S2016 E3 Length 10:09 Premiere Date 02/26/16

The Origins Of Government Surveillance

S2016 E2 Length 08:27 Premiere Date 01/29/16

The Birth of Modern Medical Care in America

S2016 E1 Length 09:10 Premiere Date 02/05/16

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