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Ancient Pyramids Uncovered in the Amazon

The pyramid was built over 5,000 years ago, even before the pyramids of Egypt and Mesopotamia, a time when archeologists had believed the Amazon was populated only by hunter-gatherers.
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Clip Season 50 Episode 3 Length 03:56 Premiere: 02/15/23

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Season 50 Episodes

Lee and Liza's Family Tree
S50 E18 Length 53:30 Premiere Date 11/22/23

The Battle to Beat Malaria
S50 E17 Length 53:54 Premiere Date 11/15/23

Inside China's Tech Boom
S50 E16 Length 53:20 Premiere Date 11/08/23

Ancient Earth: Humans
S50 E15 Length 53:15 Premiere Date 11/01/23

Ancient Earth: Inferno
S50 E14 Length 53:45 Premiere Date 10/25/23

Ancient Earth: Life Rising
S50 E13 Length 53:47 Premiere Date 10/18/23

Ancient Earth: Frozen
S50 E12 Length 53:46 Premiere Date 10/11/23

Ancient Earth: Birth of the Sky
S50 E11 Length 53:47 Premiere Date 10/04/23

Your Brain: Who's in Control?
S50 E10 Length 53:31 Premiere Date 05/24/23

Your Brain: Perception Deception
S50 E9 Length 53:30 Premiere Date 05/17/23

Hidden Volcano Abyss
S50 E8 Length 53:19 Premiere Date 05/10/23

Saving the Right Whale
S50 E7 Length 53:31 Premiere Date 05/03/23

Chasing Carbon Zero
S50 E6 Length 53:31 Premiere Date 04/26/23

Weathering the Future
S50 E5 Length 53:31 Premiere Date 04/12/23

Rare Fossil Appears to Show Mammal Attacking Dinosaur
Clip Length 03:26 Premiere Date 07/28/23

The nation’s first big offshore wind farm is coming
Clip Length 05:22 Premiere Date 07/21/23

What Made the Titan Submersible Design Unconventional?
Clip Length 05:05 Premiere Date 07/03/23

Could Whale Poop Help Cool the Planet?
Clip Length 02:43 Premiere Date 05/12/23

This Fungus Is Spreading Rapidly in Hospitals
Clip Length 03:24 Premiere Date 04/24/23

There’s Something Living in Wildfire Smoke
Clip Length 01:59 Premiere Date 04/11/23

How the West Is Making It Rain, With Science
Clip Length 06:22 Premiere Date 04/10/23

Soothing Science: The Light You See at Sunset
Clip Length 08:01 Premiere Date 04/04/23

Ancient Builders of the Amazon Preview
Preview Length 00:27 Premiere Date 02/15/23

Ancient Cliff Paintings in the Amazon
Clip Length 03:20 Premiere Date 02/15/23

Ancient Pyramids Uncovered in the Amazon
Clip Length 03:56 Premiere Date 02/15/23

The Mystery and Physics of the Spiral Football Pass
Clip Length 03:43 Premiere Date 02/13/23

Astronaut Walter Cunningham on the Historic Apollo 7 Mission
Clip Length 32:26 Premiere Date 01/25/23

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Pompeii's Secret Underworld - S52 E5

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

  • Sunday March 22, 2026 7:00 pm ET on KET2
  • Sunday March 22, 2026 6:00 pm CT on KET2
  • Tuesday March 24, 2026 12:00 am ET on KET2
  • Monday March 23, 2026 11:00 pm CT on KET2
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  • 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
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  • Thursday March 26, 2026 4:00 pm CT on KET
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  • Monday March 30, 2026 11:00 pm CT on KET2
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  • 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
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  • Thursday April 2, 2026 4:00 pm CT on KET
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  • 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
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  • 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
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  • Sunday April 19, 2026 7:00 pm ET on KET2
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  • Tuesday April 21, 2026 1:00 am ET on KET2
  • Tuesday April 21, 2026 12:00 am CT on KET2
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Pompeii's Secret Underworld - S52 E5

  • Friday March 20, 2026 2:00 am ET on KET
  • Friday March 20, 2026 1:00 am CT on KET
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  • Thursday March 19, 2026 4:00 pm CT on KET
  • Wednesday March 18, 2026 9:00 pm ET 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
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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
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