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Invisibility Cloak

Researchers are working on bending microwaves to create a cloak device, allowing invisibility from radar.
Length 01:22 Premiere: 09/24/13

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Season Episodes

Lee and Liza's Family Tree
S50 E18 Length 53:31 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 53:19 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 53:20 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

New Eye on the Universe
S50 E4 Length 53:31 Premiere Date 02/22/23

Ancient Builders of the Amazon
S50 E3 Length 53:22 Premiere Date 02/15/23

Star Chasers of Senegal
S50 E2 Length 53:20 Premiere Date 02/08/23

London Super Tunnel
S50 E1 Length 53:20 Premiere Date 02/01/23

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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Asteroid: Doomsday or Payday? - S40 E24

Premiered On: 11/20/2013

Would-be asteroid miners dream up their own program to scout for potentially profitable asteroids loaded with billions of dollars worth of elements like iron, nickel and platinum.

  • Thursday November 30, 2023 5:00 pm ET on KET
  • Thursday November 30, 2023 4:00 pm CT on KET

Ghosts of Stonehenge - S44 E14

Premiered On: 10/11/2017

Who built Stonehenge, and why? Groundbreaking archaeological digs have revealed major new clues about Britain's enigmatic 5,000-year-old site and the people who constructed it.

  • Wednesday December 6, 2023 9:00 pm ET on KET
  • Wednesday December 6, 2023 8:00 pm CT on KET
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The Next Pompeii - S46 E6

Premiered On: 02/20/2019

Discover Campi Flegrei, a lesser-known volcano in the shadow of Vesuvius, if it erupts, millions of lives could be at risk. Scientists explore its unique geology and develop a warning system that could prevent Naples from becoming the next Pompeii.

  • Wednesday December 13, 2023 9:00 pm ET on KET
  • Wednesday December 13, 2023 8:00 pm CT on KET
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Decoding the Great Pyramid - S46 E4

Premiered On: 02/06/2019

New archaeological evidence provides clues about the Egyptians who built the Great Pyramid of Giza - and how they did it.

  • Wednesday December 20, 2023 9:00 pm ET on KET
  • Wednesday December 20, 2023 8:00 pm CT on KET
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Alaskan Dinosaurs - S48 E21

Wielding chainsaws to extract fossils frozen into the permafrost and flying drones to map thousands of footprints, intrepid paleontologists discover that dinosaurs thrived in the cold and dark of the Arctic Circle.

  • Wednesday December 27, 2023 9:00 pm ET on KET
  • Wednesday December 27, 2023 8:00 pm CT on KET
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Lee and Liza's Family Tree - S50 E18

  • Friday November 24, 2023 2:00 am ET on KET
  • Friday November 24, 2023 1:00 am CT on KET
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  • Thursday November 23, 2023 4:00 pm CT on KET
  • Wednesday November 22, 2023 9:00 pm ET on KET
  • Wednesday November 22, 2023 8:00 pm CT on KET

The Battle to Beat Malaria - S50 E17

  • Wednesday November 22, 2023 8:00 am ET on KETWORLD
  • Wednesday November 22, 2023 7:00 am CT on KETWORLD
  • Wednesday November 22, 2023 12:00 am ET on KETWORLD
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  • Tuesday November 21, 2023 7:00 pm ET on KETWORLD
  • Tuesday November 21, 2023 6:00 pm CT on KETWORLD
  • Tuesday November 21, 2023 12:00 am ET on KET2
  • Monday November 20, 2023 11:00 pm CT on KET2
  • Monday November 20, 2023 5:00 am ET on KET2
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  • Sunday November 19, 2023 7:00 pm ET on KET2
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  • Friday November 17, 2023 2:00 am ET on KET
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  • Thursday November 16, 2023 5:00 pm ET on KET
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  • Wednesday November 15, 2023 8:00 pm CT on KET

Inside China's Tech Boom - S50 E16

  • Wednesday November 15, 2023 8:00 am ET on KETWORLD
  • Wednesday November 15, 2023 7:00 am CT on KETWORLD
  • Wednesday November 15, 2023 12:00 am ET on KETWORLD
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  • Tuesday November 14, 2023 7:00 pm ET on KETWORLD
  • Tuesday November 14, 2023 6:00 pm CT on KETWORLD
  • Tuesday November 14, 2023 12:00 am ET on KET2
  • Monday November 13, 2023 11:00 pm CT on KET2
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  • Friday November 10, 2023 2:00 am ET on KET
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  • Wednesday November 8, 2023 9:00 pm ET on KET
  • Wednesday November 8, 2023 8:00 pm CT on KET

Ancient Earth: Humans - S50 E15

  • Wednesday November 8, 2023 8:00 am ET on KETWORLD
  • Wednesday November 8, 2023 7:00 am CT on KETWORLD
  • Wednesday November 8, 2023 12:00 am ET on KETWORLD
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  • Tuesday November 7, 2023 6:00 pm CT on KETWORLD
  • Tuesday November 7, 2023 12:00 am ET on KET2
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  • Wednesday November 1, 2023 8:00 pm CT on KET

Ancient Earth: Inferno - S50 E14

  • Wednesday November 1, 2023 8:00 am ET on KETWORLD
  • Wednesday November 1, 2023 7:00 am CT on KETWORLD
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