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Pizza Transistor

Researchers are using nano-wires to cram more transitors into a computer chip.
Length 01:34 Premiere: 09/05/13

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Ghosts of Stonehenge

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.

  • Sunday December 11, 2022 7:00 pm ET on KET2
  • Sunday December 11, 2022 6:00 pm CT on KET2
  • Tuesday December 13, 2022 12:00 am ET on KET2
  • Monday December 12, 2022 11:00 pm CT on KET2
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  • Tuesday December 13, 2022 7:00 pm ET on KETWORLD
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  • Wednesday December 14, 2022 12:00 am ET on KETWORLD
  • Tuesday December 13, 2022 11:00 pm CT on KETWORLD
  • Wednesday December 14, 2022 8:00 am ET on KETWORLD
  • Wednesday December 14, 2022 7:00 am CT on KETWORLD

Rebuilding Notre Dame

Engineers, masons and timber workers work to restore Paris's iconic Notre Dame Cathedral.

  • Wednesday December 14, 2022 9:01 pm ET on KET
  • Wednesday December 14, 2022 8:01 pm CT on KET
  • Thursday December 15, 2022 1:01 pm ET on KET
  • Thursday December 15, 2022 12:01 pm CT on KET
  • Friday December 16, 2022 2:00 am ET on KET
  • Friday December 16, 2022 1:00 am CT on KET

Colosseum - Roman Death Trap

Premiered On: 02/11/2015

Archaeologists and engineers are teaming up to recreate a 25-foot lifting machine and trap door system capable of releasing a wolf into the Colosseum's arena for the first time in 1,500 years.

  • Sunday December 18, 2022 7:00 pm ET on KET2
  • Sunday December 18, 2022 6:00 pm CT on KET2
  • Tuesday December 20, 2022 12:00 am ET on KET2
  • Monday December 19, 2022 11:00 pm CT on KET2
  • Tuesday December 20, 2022 5:00 am ET on KET2
  • Tuesday December 20, 2022 4:00 am CT on KET2

Fighting for Fertility

Premiered On: 05/12/2021

What causes infertility, and how can assisted reproductive technologies help? Follow the journeys of people navigating fertility challenges from structural inequalities and racism to falling sperm counts, egg freezing and IVF.

  • Sunday December 25, 2022 7:00 pm ET on KET2
  • Sunday December 25, 2022 6:00 pm CT on KET2
  • Tuesday December 27, 2022 12:00 am ET on KET2
  • Monday December 26, 2022 11:00 pm CT on KET2
  • Tuesday December 27, 2022 5:00 am ET on KET2
  • Tuesday December 27, 2022 4:00 am CT on KET2

The Truth About Fat

Premiered On: 04/08/2020

Scientists are coming to understand fat as a system akin to an organ. Explore the mysteries of fat and its role in hormone production, hunger, and even pregnancy.

  • Wednesday December 28, 2022 9:00 pm ET on KET
  • Wednesday December 28, 2022 8:00 pm CT on KET
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  • Sunday January 1, 2023 7:00 pm ET on KET2
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  • Monday January 2, 2023 11:00 pm CT on KET2
  • Tuesday January 3, 2023 5:00 am ET on KET2
  • Tuesday January 3, 2023 4:00 am CT on KET2

Creatures of Light

Premiered On: 02/03/2016

Take a dazzling dive to explore how and why so many of the ocean's creatures light up - revealing a hidden undersea world where creatures flash, sparkle, shimmer, or simply glow.

  • Sunday January 8, 2023 7:00 pm ET on KET2
  • Sunday January 8, 2023 6:00 pm CT on KET2
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Ghosts of Stonehenge - S44 E14

  • Friday December 9, 2022 2:00 am ET on KET
  • Friday December 9, 2022 1:00 am CT on KET
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  • Thursday December 8, 2022 12:00 pm CT on KET
  • Wednesday December 7, 2022 9:00 pm ET on KET
  • Wednesday December 7, 2022 8:00 pm CT on KET

Emperor's Ghost Army - S41 E20

  • Wednesday December 7, 2022 8:00 am ET on KETWORLD
  • Wednesday December 7, 2022 7:00 am CT on KETWORLD
  • Wednesday December 7, 2022 12:00 am ET on KETWORLD
  • Tuesday December 6, 2022 11:00 pm CT on KETWORLD
  • Tuesday December 6, 2022 7:00 pm ET on KETWORLD
  • Tuesday December 6, 2022 6:00 pm CT on KETWORLD

Deadliest Tornadoes - S39 E10

  • Tuesday December 6, 2022 12:00 am ET on KET2
  • Monday December 5, 2022 11:00 pm CT on KET2
  • Monday December 5, 2022 3:00 am ET on KET2
  • Monday December 5, 2022 2:00 am CT on KET2

Chinese Chariot Revealed - S44 E9

  • Thursday December 1, 2022 1:00 pm ET on KET
  • Thursday December 1, 2022 12:00 pm CT on KET

Ancient Maya Metropolis - S48 E22

  • Thursday November 24, 2022 1:00 pm ET on KET
  • Thursday November 24, 2022 12:00 pm CT on KET

Zero to Infinity - S49 E19

  • Wednesday November 23, 2022 8:00 am ET on KETWORLD
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Crypto Decoded - S49 E18

  • Wednesday November 16, 2022 8:00 am ET on KETWORLD
  • Wednesday November 16, 2022 7:00 am CT on KETWORLD
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Nazca Desert Mystery - S49 E17

  • Wednesday November 9, 2022 8:00 am ET on KETWORLD
  • Wednesday November 9, 2022 7:00 am CT on KETWORLD
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  • Monday November 7, 2022 11:00 pm CT on KET2
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