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Brainless Slime Molds Navigate Mazes and Make Decisions

Meet the charismatic slime mold Physarum—which can learn, make decisions, and go through mazes without a brain—and the researchers studying it.
Clip Season 47 Episode 12 Length 02:46 Premiere: 09/16/20

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Season 47 Episodes

Human Nature

S47 E11 Length 1:33:41 Premiere Date 09/09/20

Eagle Power

S47 E7 Length 53:22 Premiere Date 05/20/20

Cat Tales

S47 E3 Length 53:21 Premiere Date 02/19/20

Dog Tales

S47 E2 Length 53:21 Premiere Date 02/12/20

Polar Extremes

S47 E1 Length 1:52:42 Premiere Date 02/05/20

Secret Mind of Slime Preview

Preview Length 00:27 Premiere Date 09/16/20

Brainless Slime Molds Navigate Mazes and Make Decisions

Clip Length 02:46 Premiere Date 09/16/20

The Great Australian Slime Mold Bakeoff

Clip Length 03:00 Premiere Date 09/16/20

The Joys and Challenges of Birding While Black

Clip Length 03:54 Premiere Date 09/03/20

Losing a Loved One to Early Onset Alzheimer's

Clip Length 04:53 Premiere Date 09/02/20

How Communities Can Adapt to Climate Change

Clip Length 03:59 Premiere Date 06/29/20

Can Geoengineering “Undo” Climate Change?

Clip Length 04:41 Premiere Date 06/24/20

Cutting our Greenhouse Gas Emissions to Zero

Clip Length 04:52 Premiere Date 06/19/20

Three Solutions That Can Slow or Stop Climate Change

Clip Length 04:21 Premiere Date 06/04/20

What is it Like to Live in Antarctica?

Clip Length 09:41 Premiere Date 02/26/20

Why is this Antarctic Glacier “Bleeding?”

Clip Length 10:00 Premiere Date 02/11/20

How Antarctica’s Cutest Baby Seals Grow Up

Clip Length 10:50 Premiere Date 02/05/20

Antarctica: Journey to the Bottom of the Earth

Clip Length 14:11 Premiere Date 01/29/20

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Hunt for the Oldest DNA - S51 E4

Scientists discover the oldest DNA ever found and reveal the genes of long-extinct creatures that once thrived before the last Ice Age.

  • Saturday March 2, 2024 12:00 pm ET on KETWORLD
  • Saturday March 2, 2024 11:00 am CT on KETWORLD

Reef Rescue - S48 E4

Premiered On: 04/21/2021

Scientists from around the world are rushing to help corals adapt to a changing climate through assisted evolution.

  • Tuesday March 5, 2024 7:00 pm ET on KETWORLD
  • Tuesday March 5, 2024 6:00 pm CT on KETWORLD
  • Wednesday March 6, 2024 12:00 am ET on KETWORLD
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  • Wednesday March 6, 2024 8:00 am ET on KETWORLD
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The Great Electric Airplane Race - S48 E7

Premiered On: 05/26/2021

The program explores emission-free electric planes on the horizon and some impressive prototypes already in the air.

  • Thursday March 7, 2024 5:00 pm ET on KET
  • Thursday March 7, 2024 4:00 pm CT on KET
  • Tuesday March 12, 2024 12:00 am ET on KET2
  • Monday March 11, 2024 11:00 pm CT on KET2

Arctic Sinkholes - S49 E1

Scientists investigate colossal explosions in Siberia and other evidence that rapidly melting soil in the Arctic is releasing vast amounts of methane, a potent greenhouse gas.

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

Hidden Volcano Abyss - S50 E8

In January 2022, one of the most powerful volcanic eruptions in recorded history rocked the islands of Tonga. Join scientists as they investigate what caused the blast, how it spurred a devastating tsunami and if another eruption could be imminent.

  • Friday March 15, 2024 4:00 pm ET on KET
  • Friday March 15, 2024 3:00 pm CT on KET
  • Sunday March 17, 2024 7:00 pm ET on KET2
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  • Monday March 18, 2024 11:00 pm CT on KET2
  • Tuesday March 19, 2024 5:01 am ET on KET2
  • Tuesday March 19, 2024 4:01 am CT on KET2

Polar Extremes - S47 E1

Premiered On: 02/05/2020

Uncover the bizarre history of the poles, from miles-high ice sheets to warm polar forests teeming with life.

  • Wednesday March 20, 2024 9:00 pm ET on KET
  • Wednesday March 20, 2024 8:00 pm CT on KET
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  • Thursday March 21, 2024 3:00 pm CT 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.

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

A.I. Revolution - S51 E5

From cancer cures to Terminator-style takeovers, leading experts explore what A.I. can - and can't - do today and what lies ahead.

  • Wednesday March 27, 2024 9:00 pm ET on KET
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Reef Rescue - S48 E4

  • Friday March 1, 2024 2:00 am ET on KET
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  • Wednesday February 28, 2024 9:00 pm ET on KET
  • Wednesday February 28, 2024 8:00 pm CT on KET

Forgotten Genius - S34 E3

  • Wednesday February 28, 2024 9:00 am ET on KETWORLD
  • Wednesday February 28, 2024 8:00 am CT on KETWORLD
  • Wednesday February 28, 2024 1:00 am ET on KETWORLD
  • Wednesday February 28, 2024 12:00 am CT on KETWORLD
  • Tuesday February 27, 2024 8:00 pm ET on KETWORLD
  • Tuesday February 27, 2024 7:00 pm CT on KETWORLD

Hunt for the Oldest DNA - S51 E4

  • Wednesday February 28, 2024 8:00 am ET on KETWORLD
  • Wednesday February 28, 2024 7:00 am CT on KETWORLD
  • Wednesday February 28, 2024 12:00 am ET on KETWORLD
  • Tuesday February 27, 2024 11:00 pm CT on KETWORLD
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Lee and Liza's Family Tree - S50 E18

  • Wednesday February 21, 2024 10:00 am ET on KETWORLD
  • Wednesday February 21, 2024 9:00 am CT on KETWORLD
  • Wednesday February 21, 2024 2:00 am ET on KETWORLD
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Building the Eiffel Tower - S51 E3

  • Wednesday February 21, 2024 8:00 am ET on KETWORLD
  • Wednesday February 21, 2024 7:00 am CT on KETWORLD
  • Wednesday February 21, 2024 12:00 am ET on KETWORLD
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Star Chasers of Senegal - S50 E2

  • Wednesday February 14, 2024 10:00 am ET on KETWORLD
  • Wednesday February 14, 2024 9:00 am CT on KETWORLD
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  • Tuesday February 13, 2024 9:00 pm ET on KETWORLD
  • Tuesday February 13, 2024 8:00 pm CT on KETWORLD

Easter Island Origins - S51 E2

  • Wednesday February 14, 2024 8:00 am ET on KETWORLD
  • Wednesday February 14, 2024 7:00 am CT on KETWORLD
  • Wednesday February 14, 2024 12:00 am ET on KETWORLD
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  • Wednesday February 7, 2024 9:00 pm ET on KET
  • Wednesday February 7, 2024 8:00 pm CT on KET

Hindenburg: The New Evidence - S48 E6

  • Wednesday February 7, 2024 10:00 am ET on KETWORLD
  • Wednesday February 7, 2024 9:00 am CT on KETWORLD
  • Wednesday February 7, 2024 2:00 am ET on KETWORLD
  • Wednesday February 7, 2024 1:00 am CT on KETWORLD
  • Tuesday February 6, 2024 9:00 pm ET on KETWORLD
  • Tuesday February 6, 2024 8:00 pm CT on KETWORLD

When Whales Could Walk - S51 E1

  • Wednesday February 7, 2024 8:00 am ET on KETWORLD
  • Wednesday February 7, 2024 7:00 am CT on KETWORLD
  • Wednesday February 7, 2024 12:00 am ET on KETWORLD
  • Tuesday February 6, 2024 11:00 pm CT on KETWORLD
  • Tuesday February 6, 2024 7:00 pm ET on KETWORLD
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  • Wednesday January 31, 2024 9:00 pm ET on KET
  • Wednesday January 31, 2024 8:00 pm CT on KET

Iceman Reborn - S43 E5

  • Wednesday January 31, 2024 8:00 am ET on KETWORLD
  • Wednesday January 31, 2024 7:00 am CT on KETWORLD
  • Wednesday January 31, 2024 12:00 am ET on KETWORLD
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  • Tuesday January 30, 2024 6:00 pm CT on KETWORLD
  • Tuesday January 30, 2024 12:00 am ET on KET2
  • Monday January 29, 2024 11:00 pm CT on KET2
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