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How the Universe Will End

Dark energy is spreading the universe apart—what’s it mean for astronomy in the future?
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Clip Season 45 Episode 106 Length 01:29 Premiere: 04/04/18

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Season 45 Episodes

Thai Cave Rescue
S45 E14 Length 53:34 Premiere Date 10/29/18

Addiction
S45 E12 Length 53:45 Premiere Date 09/25/18

Black Hole Apocalypse
S45 E1 Length 53:26 Premiere Date 12/06/17

What's the Universe Made Of? Preview
Preview Length 00:28 Premiere Date 04/04/18

How Scientists Discovered Dark Matter
Clip Length 02:37 Premiere Date 04/04/18

How the Universe Will End
Clip Length 01:29 Premiere Date 04/04/18

Physics Is a Never-Ending Puzzle
Clip Length 01:08 Premiere Date 04/04/18

Profile: Priya Natarajan
Clip Length 05:38 Premiere Date 04/04/18

Wild Ways to Find a Mate
Clip Length 03:44 Premiere Date 02/14/18

What The Physics?! - Q&A
Clip Length 07:37 Premiere Date 02/14/18

What Is Blockchain?
Clip Length 03:17 Premiere Date 02/07/18

What Is Bitcoin?
Clip Length 02:14 Premiere Date 02/07/18

Seeing Quantum with the Naked Eye
Clip Length 03:55 Premiere Date 02/06/18

Can Tech Save Players’ Brains?
Clip Length 02:49 Premiere Date 02/03/18

Does the Flu Shot Work?
Clip Length 02:14 Premiere Date 01/17/18

Predicting Landslides
Clip Length 01:34 Premiere Date 01/17/18

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Pompeii's Secret Underworld - S52 E5

Archaeologists uncover new truths about Pompeii, a wealthy Roman playground with dark secrets.

  • Wednesday March 18, 2026 9:00 pm ET on KET
  • Wednesday March 18, 2026 8:00 pm CT on KET
  • Thursday March 19, 2026 5:00 pm ET on KET
  • Thursday March 19, 2026 4:00 pm CT on KET
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  • Friday March 20, 2026 1:00 am CT on KET
  • Sunday March 22, 2026 7:00 pm ET on KET2
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  • Tuesday March 24, 2026 12:00 am ET on KET2
  • Monday March 23, 2026 11:00 pm CT on KET2
  • Tuesday March 24, 2026 5:00 am ET on KET2
  • Tuesday March 24, 2026 4:00 am CT on KET2

Baltimore Bridge Collapse - S52 E6

Explores the March 2024 collapse of the Francis Scott Key Bridge in Baltimore, a busy four-lane bridge that served as a crucial link in the global shipping chain on the U.S. Eastern Seaboard.

  • Wednesday March 25, 2026 9:00 pm ET on KET
  • Wednesday March 25, 2026 8:00 pm CT on KET
  • Thursday March 26, 2026 5:00 pm ET on KET
  • Thursday March 26, 2026 4:00 pm CT on KET
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  • Sunday March 29, 2026 7:00 pm ET on KET2
  • Sunday March 29, 2026 6:00 pm CT on KET2
  • Tuesday March 31, 2026 12:00 am ET on KET2
  • Monday March 30, 2026 11:00 pm CT on KET2
  • Tuesday March 31, 2026 5:00 am ET on KET2
  • Tuesday March 31, 2026 4:00 am CT on KET2

Your Brain: Perception Deception - S50 E9

Join neuroscientist Heather Berlin on a quest to understand how your brain shapes your reality, and why you can't always trust what you perceive. Learn the surprising tricks and shortcuts the brain takes to help us survive.

  • Wednesday April 1, 2026 9:00 pm ET on KET
  • Wednesday April 1, 2026 8:00 pm CT on KET
  • Thursday April 2, 2026 5:00 pm ET on KET
  • Thursday April 2, 2026 4:00 pm CT on KET
  • Friday April 3, 2026 2:00 am ET on KET
  • Friday April 3, 2026 1:00 am CT on KET
  • Sunday April 5, 2026 7:00 pm ET on KET2
  • Sunday April 5, 2026 6:00 pm CT on KET2
  • Tuesday April 7, 2026 1:00 am ET on KET2
  • Tuesday April 7, 2026 12:00 am CT on KET2

Your Brain: Who's in Control? - S50 E10

Dive into the latest research on the subconscious to see what's really driving the decisions you make.

  • Wednesday April 8, 2026 9:00 pm ET on KET
  • Wednesday April 8, 2026 8:00 pm CT on KET
  • Thursday April 9, 2026 5:00 pm ET on KET
  • Thursday April 9, 2026 4:00 pm CT on KET
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  • Friday April 10, 2026 1:00 am CT on KET
  • Sunday April 12, 2026 7:00 pm ET on KET2
  • Sunday April 12, 2026 6:00 pm CT on KET2
  • Tuesday April 14, 2026 1:00 am ET on KET2
  • Tuesday April 14, 2026 12:00 am CT on KET2

Athens: Birth of Democracy - S53 E7

Archaeologists investigate the dramatic origins of democracy in ancient Greece 2,500 years ago. Mass graves and ancient ruins where tyrants were murdered shine new light on the birth of a revolutionary form of government.

  • Wednesday April 15, 2026 9:00 pm ET on KET
  • Wednesday April 15, 2026 8:00 pm CT on KET
  • Thursday April 16, 2026 5:00 pm ET on KET
  • Thursday April 16, 2026 4:00 pm CT on KET
  • Friday April 17, 2026 2:00 am ET on KET
  • Friday April 17, 2026 1:00 am CT on KET
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The Planets: Mars - S46 E13

  • Thursday March 12, 2026 4:30 pm ET on KET
  • Thursday March 12, 2026 3:30 pm CT on KET

Stone Age Temple Mystery - S53 E6

  • Tuesday March 3, 2026 5:00 am ET on KET2
  • Tuesday March 3, 2026 4:00 am CT on KET2
  • Tuesday March 3, 2026 12:00 am ET on KET2
  • Monday March 2, 2026 11:00 pm CT on KET2
  • Sunday March 1, 2026 7:00 pm ET on KET2
  • Sunday March 1, 2026 6:00 pm CT on KET2
  • Friday February 27, 2026 2:00 am ET on KET
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  • Thursday February 26, 2026 4:00 pm CT on KET
  • Wednesday February 25, 2026 9:00 pm ET on KET
  • Wednesday February 25, 2026 8:00 pm CT on KET

Building the Eiffel Tower - S51 E3

  • Tuesday February 24, 2026 5:00 am ET on KET2
  • Tuesday February 24, 2026 4:00 am CT on KET2
  • Tuesday February 24, 2026 12:00 am ET on KET2
  • Monday February 23, 2026 11:00 pm CT on KET2
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  • Thursday February 19, 2026 4:00 pm CT on KET
  • Wednesday February 18, 2026 9:00 pm ET on KET
  • Wednesday February 18, 2026 8:00 pm CT on KET

Mammal Origins - S53 E4

  • Tuesday February 17, 2026 5:00 am ET on KET2
  • Tuesday February 17, 2026 4:00 am CT on KET2
  • Tuesday February 17, 2026 12:00 am ET on KET2
  • Monday February 16, 2026 11:00 pm CT on KET2
  • Sunday February 15, 2026 7:00 pm ET on KET2
  • Sunday February 15, 2026 6:00 pm CT on KET2
  • Friday February 13, 2026 2:00 am ET on KET
  • Friday February 13, 2026 1:00 am CT on KET
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