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Why Bats Share Blood

Vampire bats will sometimes share a blood meal—but only with friends and family.
Clip Length 01:54 Premiere: 11/22/16

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Season Episodes

Great American Eclipse

S51 E6 Length 53:34 Premiere Date 04/03/24

A.I. Revolution

S51 E5 Length 53:30 Premiere Date 03/27/24

Hunt for the Oldest DNA

S51 E4 Length 53:10 Premiere Date 02/21/24

Building the Eiffel Tower

S51 E3 Length 53:29 Premiere Date 02/14/24

Easter Island Origins

S51 E2 Length 53:17 Premiere Date 02/07/24

When Whales Could Walk

S51 E1 Length 53:31 Premiere Date 01/31/24

Rebuilding 7 World Trade Center

Clip Length 01:48 Premiere Date 08/31/11

The 9/11 Memorial Mock-Up

Clip Length 01:54 Premiere Date 08/24/11

Solving an Engineering Problem

Clip Length 02:49 Premiere Date 08/24/11

Walls of Glass

Clip Length 02:29 Premiere Date 08/24/11

The Memorial Plaques

Clip Length 02:31 Premiere Date 08/24/11

Brian Greene Answers Your Questions

Clip Length 01:07 Premiere Date 08/02/11

A Strict Carbon Diet

Clip Length 02:58 Premiere Date 04/12/11

Green Energy in China

Clip Length 05:09 Premiere Date 04/12/11

A Mind for Music

Clip Length 04:05 Premiere Date 02/09/11

Modeling a Comet Airburst

Clip Length 03:20 Premiere Date 02/09/11

Six Questions with David Pogue

Clip Length 02:33 Premiere Date 01/04/11

Surviving an Elevator Fall

Clip Length 01:31 Premiere Date 08/23/10

Shabbat Elevator

Clip Length 02:42 Premiere Date 08/23/10

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Ancient Maya Metropolis - S48 E22

NOVA investigates why the ancient Maya abandoned the magnificent cities they had lived in for centuries.

  • Sunday April 14, 2024 7:00 pm ET on KET2
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Making North America: Origins - S42 E20

Premiered On: 11/04/2015

Discover how forces of almost unimaginable power gave birth to the continent of North America.

  • Wednesday April 17, 2024 10:00 pm ET on KET
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Making North America: Life - S42 E21

Premiered On: 11/11/2015

The mysteries of how life evolved in North America, including the arrival of humans, are explored.

  • Wednesday April 24, 2024 10:00 pm ET on KET
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Making North America: Human - S42 E22

Premiered On: 11/18/2015

From Ice Age to oil boom, discover the challenges faced and the wealth uncovered as humans take over the continent.

  • Wednesday May 1, 2024 10:00 pm ET on KET
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Why Bridges Collapse - S46 E18

Premiered On: 10/16/2019

NOVA investigates what may have led to the collapse of the Polcevera Bridge in Genoa, Italy, that killed 43 people. But the Polcevera Bridge isn't alone. Join experts as they compare what happened to the Polcevera with other deadly bridge collapses, including Minnesota's I-35W bridge over the Mississippi and the famed Silver Bridge over the Ohio River.

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Ancient Maya Metropolis - S48 E22

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Secrets of the Forbidden City - S44 E15

  • Friday April 5, 2024 3:00 am ET on KET
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  • Wednesday April 3, 2024 10:00 pm ET on KET
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Great American Eclipse - S51 E6

  • Wednesday April 10, 2024 8:00 am ET on KETWORLD
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  • Wednesday April 3, 2024 7:00 pm CT on KET

A.I. Revolution - S51 E5

  • Wednesday April 3, 2024 5:00 pm ET on KET
  • Wednesday April 3, 2024 4:00 pm CT on KET
  • Wednesday April 3, 2024 8:00 am ET on KETWORLD
  • Wednesday April 3, 2024 7:00 am CT on KETWORLD
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  • Wednesday March 27, 2024 9:00 pm ET on KET
  • Wednesday March 27, 2024 8:00 pm CT on KET

Why Bridges Collapse - S46 E18

  • Sunday March 24, 2024 7:00 pm ET on KET2
  • Sunday March 24, 2024 6:00 pm CT on KET2

Polar Extremes - S47 E1

  • Wednesday March 27, 2024 8:00 am ET on KETWORLD
  • Wednesday March 27, 2024 7:00 am CT on KETWORLD
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Hidden Volcano Abyss - S50 E8

  • Wednesday March 20, 2024 8:00 am ET on KETWORLD
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Arctic Sinkholes - S49 E1

  • Thursday March 14, 2024 5:00 pm ET on KET
  • Thursday March 14, 2024 4:00 pm CT on KET

Picture a Scientist - S48 E3

  • Wednesday March 13, 2024 9:00 am ET on KETWORLD
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Butterfly Blueprints - S48 E20

  • Wednesday March 13, 2024 8:00 am ET on KETWORLD
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