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Reef Rescue Preview

If oceans continue to warm at the current pace, coral reefs could be wiped out by the end of the century. But scientists from around the globe are rushing to help corals adapt to a changing climate through assisted evolution.
Preview Season 48 Episode 4 Length 00:28 Premiere: 04/21/21

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The show hosts and the show logo.The show hosts and the show logo.

Season 48 Episodes

Ancient Maya Metropolis

S48 E22 Length 53:32 Premiere Date 01/26/22

Alaskan Dinosaurs

S48 E21 Length 53:32 Premiere Date 01/19/22

Butterfly Blueprints

S48 E20 Length 53:31 Premiere Date 01/12/22

NOVA Universe Revealed: Big Bang

S48 E19 Length 53:16 Premiere Date 11/24/21

NOVA Universe Revealed: Black Holes

S48 E18 Length 53:16 Premiere Date 11/17/21

NOVA Universe Revealed: Alien Worlds

S48 E17 Length 53:17 Premiere Date 11/10/21

NOVA Universe Revealed: Milky Way

S48 E16 Length 53:17 Premiere Date 11/03/21

NOVA Universe Revealed: Age of Stars

S48 E15 Length 53:17 Premiere Date 10/27/21

Edible Insects

S48 E14 Length 53:28 Premiere Date 10/20/21

Arctic Drift

S48 E13 Length 53:32 Premiere Date 10/13/21

Particles Unknown

S48 E12 Length 53:28 Premiere Date 10/06/21

The Cannabis Question

S48 E11 Length 53:36 Premiere Date 09/29/21

Bat Superpowers

S48 E10 Length 53:23 Premiere Date 09/15/21

Ship That Changed the World

S48 E9 Length 53:12 Premiere Date 06/02/21

High-Risk High-Rise

S48 E8 Length 53:00 Premiere Date 01/05/22

Great Electric Airplane Race

S48 E7 Length 53:07 Premiere Date 05/26/21

Hindenburg: The New Evidence

S48 E6 Length 53:13 Premiere Date 05/19/21

Fighting for Fertility

S48 E5 Length 53:06 Premiere Date 05/12/21

Reef Rescue

S48 E4 Length 53:21 Premiere Date 04/21/21

Picture a Scientist

S48 E3 Length 1:33:06 Premiere Date 04/14/21

Looking for Life on Mars

S48 E2 Length 53:46 Premiere Date 02/24/21

Secrets in our DNA

S48 E1 Length 53:26 Premiere Date 01/13/21

Reef Rescue Preview

Preview Length 00:28 Premiere Date 04/21/21

Scientists Breed a New Generation of "Super Corals"

Clip Length 04:45 Premiere Date 04/21/21

This University Monitors COVID-19 Through Saliva Testing

Clip Length 06:53 Premiere Date 01/15/21

Lingering Symptoms from COVID-19 are “Unprecedented”

Clip Length 05:05 Premiere Date 02/04/21

New COVID-19 Variants Spread More Easily

Clip Length 07:15 Premiere Date 02/04/21

Why Misinformation Matters

Clip Length 02:41 Premiere Date 02/11/21

Dream Hacking: Decisions, Addictions, and Sleep

Clip Length 14:34 Premiere Date 02/18/21

How Mask-Wearing Misinformation Became a Reality

Clip Length 05:38 Premiere Date 02/23/21

The Big Lie about Monarch Butterflies

Clip Length 09:25 Premiere Date 03/15/21

Origins of Misinformation and How it Spreads

Clip Length 05:47 Premiere Date 03/15/21

Texas' Power Grid Trouble is Far From Over

Clip Length 08:23 Premiere Date 03/20/21

GameStop, Reddit, and the Rise of Risky Trades

Clip Length 08:35 Premiere Date 04/27/21

Are You Feeding a Powerful Facial Recognition Algorithm?

Clip Length 06:55 Premiere Date 04/30/21

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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.

  • Friday December 9, 2022 2:00 am ET on KET
  • Friday December 9, 2022 1:00 am CT on KET
  • Sunday December 11, 2022 7:00 pm ET on KET2
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Rebuilding Notre Dame

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

  • Wednesday December 14, 2022 9:00 pm ET on KET
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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
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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
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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
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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

  • Thursday December 8, 2022 1:00 pm ET on KET
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Emperor's Ghost Army - S41 E20

  • Wednesday December 7, 2022 8:00 am ET on KETWORLD
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Deadliest Tornadoes - S39 E10

  • Tuesday December 6, 2022 12:00 am ET on KET2
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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
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Nazca Desert Mystery - S49 E17

  • Wednesday November 9, 2022 8:00 am ET on KETWORLD
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