What Caused the Dinosaurs to Go Extinct?

The asteroid released the equivalent of 10-billion nuclear bombs worth of energy when it struck Earth. The impact started a chain of events that wiped out 75% of all plants and animals at the time.

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Clip Season 50 Episode 15 Length 01:50 Premiere: 11/01/23

Recent Episodes

Evolution: Brain Power

S53 E13 Length 53:34 Premiere Date 10/14/26

Space Wars

S53 E12 Length 53:54 Premiere Date 10/07/26

Stone Age Masterpiece

S53 E11 Length 53:42 Premiere Date 09/30/26

Knowledge Keepers

S53 E10 Length 53:41 Premiere Date 09/23/26

The Battle to Breathe

S53 E9 Length 53:34 Premiere Date 09/16/26

Clips & Previews

What Caused the Dinosaurs to Go Extinct?

Clip Length 01:50 Premiere Date 11/01/23

How To Film Great Video With A Phone | NOVA Science Studio

Clip Length 03:54 Premiere Date 09/28/23

Introducing the NOVA Science Studio Program

Clip Length 02:42 Premiere Date 09/28/23

Rare Fossil Appears to Show Mammal Attacking Dinosaur

Clip Length 03:26 Premiere Date 07/28/23

The nation’s first big offshore wind farm is coming

Clip Length 05:22 Premiere Date 07/21/23

What Made the Titan Submersible Design Unconventional?

Clip Length 05:05 Premiere Date 07/03/23

Could Whale Poop Help Cool the Planet?

Clip Length 02:43 Premiere Date 05/12/23

This Fungus Is Spreading Rapidly in Hospitals

Clip Length 03:24 Premiere Date 04/24/23

There’s Something Living in Wildfire Smoke

Clip Length 01:59 Premiere Date 04/11/23

How the West Is Making It Rain, With Science

Clip Length 06:22 Premiere Date 04/10/23

Soothing Science: The Light You See at Sunset

Clip Length 08:01 Premiere Date 04/04/23

The Mystery and Physics of the Spiral Football Pass

Clip Length 03:43 Premiere Date 02/13/23

Astronaut Walter Cunningham on the Historic Apollo 7 Mission

Clip Length 32:26 Premiere Date 01/25/23

Specials

Interview: The Fusion Future with Dennis Whyte

Length 1:30:21 Premiere Date 10/08/26

Interview: Talking Dogs, Grumpy Cats, and Animal Communication with Federico Rossano

Length 1:19:51 Premiere Date 09/24/26

Interview: How to Save The “Doomsday Glacier” with Brent Minchew

Length 1:29:07 Premiere Date 09/10/26

Interview: The Hidden Math Behind Everything with Jordan Ellenberg

Length 1:16:29 Premiere Date 08/27/26

Interview: Hobbits, Neanderthals, and Dragon Man with Ella Al-Shamahi

Length 58:04 Premiere Date 08/13/26

Interview: The Future of AI and Us with Daniela Rus

Length 1:08:49 Premiere Date 07/30/26

Interview: Good Anxiety, Exercise, and Connection on the Brain with Wendy Suzuki

Length 1:15:20 Premiere Date 07/16/26

Interview: T. Rex to Birds with Steve Brusatte

Length 1:24:42 Premiere Date 07/02/26

Interview: Dark Matter = Black Holes? with David Kaiser

Length 1:23:48 Premiere Date 06/18/26

Interview: Discovering Dark Energy and the Hubble Tension with Nobel Prize Winner Adam Riess

Length 1:16:19 Premiere Date 12/19/25

Interview: Evolution of New Species, Venom, Wings, and More with Sean B. Carroll

Length 1:24:09 Premiere Date 12/05/25

Interview: De-Extinction, Dire Wolves, and Jurassic Park with Beth Shapiro

Length 54:49 Premiere Date 11/21/25

Particles of Thought: The Extremophile’s Guide to Life

Length 1:11:15 Premiere Date 11/04/25

Interview: The Animal Translator with Erich Jarvis

Length 1:03:49 Premiere Date 10/21/25

Interview: Brain Guru with Heather Berlin

Length 1:28:59 Premiere Date 10/07/25

Interview: Bob and Mike’s Big Idea with Bob Hazen and Mike Wong

Length 1:11:13 Premiere Date 09/23/25

Interview: Black Hole Badass with Janna Levin

Length 1:19:54 Premiere Date 09/05/25

Interview: The Deepfake Detective with Hany Farid

Length 1:25:01 Premiere Date 08/26/25

Interview: Mind of a Fossil Hunter with Kirk Johnson

Length 1:37:18 Premiere Date 08/18/25

When Machines Prescribe

Length 17:19 Premiere Date 04/30/25

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Length 06:47 Premiere Date 09/13/24

Keepers of the Coastline

Length 11:56 Premiere Date 09/13/24

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Length 08:44 Premiere Date 09/13/24

Megadroughts and Indigenous Voices

Length 07:51 Premiere Date 09/13/24

Harvesting the Future

Length 09:22 Premiere Date 09/13/24

Sea Change: Survival in the Gulf of Maine

Length 53:30 Premiere Date 08/07/24

Sea Change: Peril in the Gulf of Maine

Length 53:30 Premiere Date 07/31/24

Sea Change: Bounty in the Gulf of Maine

Length 53:30 Premiere Date 07/24/24

When Whales Could Walk (Español)

Length 53:30 Premiere Date 01/01/24

Ancient Builders of the Amazon (Español)

Length 53:21 Premiere Date 02/15/23

Ancient Maya Metropolis (Español)

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Length 1:52:37 Premiere Date 04/14/21

Treasures Metals Eiffel Tower

Length 02:09 Premiere Date 12/09/16

A Labyrinth of Lava

Length 01:13 Premiere Date 11/02/15

From Mud to Rock

Length 01:36 Premiere Date 10/22/15

Finding Stromatolites

Length 01:23 Premiere Date 10/22/15

Stromatolites Were Kings

Length 01:05 Premiere Date 10/22/15

Ancient Life

Length 00:28 Premiere Date 10/22/15

Millions of Years Captured in Chalk

Length 01:17 Premiere Date 10/22/15

A Fourteen-Foot Fish From Kansas

Length 01:38 Premiere Date 10/22/15

Hell Creek Formation

Length 01:10 Premiere Date 10/22/15

No Dinosaurs Above the Line

Length 02:00 Premiere Date 10/22/15

Mammal Survivors

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Dinosaur Fossils

Length 01:53 Premiere Date 10/22/15

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Length 01:47 Premiere Date 10/22/15

Pangea

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Length 02:16 Premiere Date 10/22/15

A Massive Volcanic Eruption

Length 01:14 Premiere Date 10/22/15

Rock Time Capsules

Length 01:18 Premiere Date 10/21/15

The Sandstone Top of the Canyon

Length 01:15 Premiere Date 10/21/15

Fossil-Filled Limestone

Length 00:54 Premiere Date 10/21/15

The Grand Canyon's Oldest Rocks

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From Lava to Land

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Semi-Precious Pebbles

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Five Steps of Volcanic Rock

Length 00:26 Premiere Date 10/21/15

Tearing North America Apart

Length 01:01 Premiere Date 10/21/15

Fossilized Sand Dunes

Length 01:15 Premiere Date 10/21/15

Volcanoes of Sand

Length 01:33 Premiere Date 10/21/15

Rockies 2.0

Length 02:00 Premiere Date 10/21/15

Manhattan Schist

Length 01:13 Premiere Date 10/21/15

Manhattan Skyline

Length 00:52 Premiere Date 10/21/15

New York's Mountains

Length 01:13 Premiere Date 10/21/15

Mendenhall Glacier

Length 02:51 Premiere Date 08/02/15

Monument Rocks 1

Length 01:18 Premiere Date 08/02/15

Monument Rocks 2

Length 01:48 Premiere Date 08/02/15

Exuma Cays 1

Length 01:26 Premiere Date 08/02/15

Exuma Cays 3

Length 00:28 Premiere Date 08/02/15

Exuma Cays 4

Length 03:22 Premiere Date 08/02/15

Gooseberry Falls 1

Length 00:57 Premiere Date 08/02/15

Gooseberry Falls 2

Length 00:24 Premiere Date 08/02/15

Gooseberry Falls 3

Length 01:06 Premiere Date 08/02/15

Gooseberry Falls 4

Length 01:01 Premiere Date 08/02/15

Mount Kilauea

Length 01:30 Premiere Date 08/02/15

Grand Canyon 1

Length 01:19 Premiere Date 08/02/15

Grand Canyon 2

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Grand Canyon 3

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Grand Canyon 4

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RNAi Explained

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Dolphin Mirror

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Dogs' Sense of Time

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Cockatoo Excerpt

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Animal Robot 2

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Therapeutic Hypothermia

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Therapeutic Hypothermia 2

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Therapeutic Hypothermia 3

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Therapeutic Hypothermia 4

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Sneak Peek: Making Stuff Wilder

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Virus Battery

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Elephant Arm

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FinGripper

Length 00:55 Premiere Date 10/19/13

Sail Wing

Length 01:02 Premiere Date 10/19/13

Hydrofoil

Length 01:01 Premiere Date 10/19/13

Chicken Feathers

Length 01:56 Premiere Date 10/19/13

KillaCycle

Length 00:48 Premiere Date 10/19/13

How Batteries Work

Length 00:49 Premiere Date 10/19/13

Muon Detection

Length 01:52 Premiere Date 10/19/13

Muons

Length 01:25 Premiere Date 10/19/13

Plants White

Length 02:11 Premiere Date 10/19/13

DNA Patch

Length 01:19 Premiere Date 10/19/13

DNA Vaccine

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Earthquake Test

Length 02:03 Premiere Date 10/19/13

David Drives

Length 01:27 Premiere Date 10/19/13

Shelley

Length 02:07 Premiere Date 10/19/13

Pitcher Plant

Length 01:48 Premiere Date 10/17/13

SLIPS

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Hagfish

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Hagfish Defense

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Sneak Peek: Making Stuff Faster

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Shape Memory Alloys

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Jellyfish

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Bird Wings

Length 01:56 Premiere Date 09/08/13

Shrinking Chips

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Pizza Transistor

Length 01:34 Premiere Date 09/05/13

Graphene

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Magnetic Oobleck

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Silicon Transistors

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The Climate Wild Card

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Life on Europa?

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Length 01:41 Premiere Date 05/29/13

CloudLab_Megastorm_04

Length 01:43 Premiere Date 05/29/13

CloudLab_Megastorm_05

Length 01:04 Premiere Date 05/29/13

CloudLab_Megastorm_06

Length 00:40 Premiere Date 05/29/13

CloudLab_Megastorm_07

Length 03:07 Premiere Date 05/29/13

CloudLab_Megastorm_01

Length 00:35 Premiere Date 05/28/13

CloudLab_Megastorm_02

Length 00:31 Premiere Date 05/28/13

What Made the 1918 Flu So Deadly?

Length 01:28 Premiere Date 05/13/13

How the 1918 Flu Infected People

Length 00:25 Premiere Date 05/13/13

Fertilizing the Amazon

Length 03:27 Premiere Date 04/21/13

Flu Probabilities

Length 01:53 Premiere Date 04/16/13

Rare Earth Elements

Length 04:17 Premiere Date 04/01/13

CHNOPS: Ingredients for Life

Length 02:36 Premiere Date 03/12/13

Electromagnetic Spectrum

Length 00:44 Premiere Date 02/28/13

MODIS Sensor

Length 00:26 Premiere Date 02/28/13

Solving the Storage Problem

Length 02:26 Premiere Date 10/25/12

Putting Energy to Use Old

Length 02:14 Premiere Date 10/08/12

Season 50 Episodes

Show Episodes

Show Clips & Previews

Lee and Liza's Family Tree

S50 E18 Length 53:30 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 53:20 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

Hidden Volcano Abyss

S50 E8 Length 53:19 Premiere Date 05/10/23

What Caused the Dinosaurs to Go Extinct?

Clip Length 01:50 Premiere Date 11/01/23

How To Film Great Video With A Phone | NOVA Science Studio

Clip Length 03:54 Premiere Date 09/28/23

Introducing the NOVA Science Studio Program

Clip Length 02:42 Premiere Date 09/28/23

Rare Fossil Appears to Show Mammal Attacking Dinosaur

Clip Length 03:26 Premiere Date 07/28/23

The nation’s first big offshore wind farm is coming

Clip Length 05:22 Premiere Date 07/21/23

What Made the Titan Submersible Design Unconventional?

Clip Length 05:05 Premiere Date 07/03/23

Could Whale Poop Help Cool the Planet?

Clip Length 02:43 Premiere Date 05/12/23

This Fungus Is Spreading Rapidly in Hospitals

Clip Length 03:24 Premiere Date 04/24/23

There’s Something Living in Wildfire Smoke

Clip Length 01:59 Premiere Date 04/11/23

How the West Is Making It Rain, With Science

Clip Length 06:22 Premiere Date 04/10/23

Soothing Science: The Light You See at Sunset

Clip Length 08:01 Premiere Date 04/04/23

The Mystery and Physics of the Spiral Football Pass

Clip Length 03:43 Premiere Date 02/13/23

Astronaut Walter Cunningham on the Historic Apollo 7 Mission

Clip Length 32:26 Premiere Date 01/25/23

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Evolution: Need to Feed - S53 E14

The surprising story of how our planet's diverse creatures became the furious feeding machines they are today.

Wednesday October 21, 2026 9:00 pm ET on KET
Wednesday October 21, 2026 8:00 pm CT on KET
Thursday October 22, 2026 5:00 pm ET on KET
Thursday October 22, 2026 4:00 pm CT on KET
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Sunday October 25, 2026 7:00 pm ET on KET2
Sunday October 25, 2026 6:00 pm CT on KET2
Tuesday October 27, 2026 1:00 am ET on KET2
Tuesday October 27, 2026 12:00 am CT on KET2

Evolution: Body Builders - S53 E15

Discover the process behind the incredible variety of animal shapes and sizes.

Wednesday October 28, 2026 9:00 pm ET on KET
Wednesday October 28, 2026 8:00 pm CT on KET
Thursday October 29, 2026 5:00 pm ET on KET
Thursday October 29, 2026 4:00 pm CT on KET
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Sunday November 1, 2026 7:00 pm ET on KET2
Sunday November 1, 2026 6:00 pm CT on KET2
Tuesday November 3, 2026 1:00 am ET on KET2
Tuesday November 3, 2026 12:00 am CT on KET2

Evolution: The Mating Game - S53 E16

Discover how the rise of sexual reproduction fuels diversity, pushing life to specialize and shaping everything from tiny single-celled organisms to towering ostriches.

Wednesday November 4, 2026 9:00 pm ET on KET
Wednesday November 4, 2026 8:00 pm CT on KET
Thursday November 5, 2026 5:00 pm ET on KET
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Sunday November 8, 2026 6:00 pm CT on KET2
Tuesday November 10, 2026 1:00 am ET on KET2
Tuesday November 10, 2026 12:00 am CT on KET2

Evolution: On the Run - S53 E17

An evolutionary ride from early aquatic ancestors to highly optimized runners like the horse.

Wednesday November 11, 2026 9:00 pm ET on KET
Wednesday November 11, 2026 8:00 pm CT on KET
Thursday November 12, 2026 5:00 pm ET on KET
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Sunday November 15, 2026 6:00 pm CT on KET2
Tuesday November 17, 2026 1:00 am ET on KET2
Tuesday November 17, 2026 12:00 am CT on KET2

NOVA Universe Revealed: Age of Stars - S48 E15

Premiered On: 10/27/2021

The Hubble Space Telescope and a heat-resistant solar probe reveal new clues about the sun's 5-billion-year history.

Monday November 16, 2026 5:00 pm ET on KET
Monday November 16, 2026 4:00 pm CT on KET

NOVA Universe Revealed: Milky Way - S48 E16

Premiered On: 11/03/2021

Explore the history of the Milky Way, including what shaped this spiral of stars, gas and dust and what its destiny will be.

Tuesday November 17, 2026 5:00 pm ET on KET
Tuesday November 17, 2026 4:00 pm CT on KET

NOVA Universe Revealed: Alien Worlds - S48 E17

Premiered On: 11/10/2021

New science and discoveries made possible by ultra-sensitive telescopes and detective work transform alien planet-hunting from science fiction into fact.

Wednesday November 18, 2026 5:00 pm ET on KET
Wednesday November 18, 2026 4:00 pm CT on KET

NOVA Universe Revealed: Black Holes - S48 E18

Premiered On: 11/17/2021

A new generation of high-powered telescopes brings black holes to light. Animation reveals what happens when objects stray too close to a black hole's point of no return.

Thursday November 19, 2026 5:00 pm ET on KET
Thursday November 19, 2026 4:00 pm CT on KET

NOVA Universe Revealed: Big Bang - S48 E19

Premiered On: 11/24/2021

Nova probes the mystery of the Big Bang with stunning animation based on space telescope images.

Friday November 20, 2026 5:00 pm ET on KET
Friday November 20, 2026 4:00 pm CT on KET

Jump to Upcoming Airdates

Recent

Evolution: Brain Power - S53 E13

Tuesday October 20, 2026 1:00 am ET on KET2
Tuesday October 20, 2026 12:00 am CT on KET2
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Wednesday October 14, 2026 9:00 pm ET on KET
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Space Wars - S53 E12

Tuesday October 13, 2026 1:00 am ET on KET2
Tuesday October 13, 2026 12:00 am CT on KET2
Sunday October 11, 2026 7:00 pm ET on KET2
Sunday October 11, 2026 6:00 pm CT on KET2
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Stone Age Masterpiece - S53 E11

Tuesday October 6, 2026 1:00 am ET on KET2
Tuesday October 6, 2026 12:00 am CT on KET2
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Wednesday September 30, 2026 9:00 pm ET on KET
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Knowledge Keepers - S53 E10

Tuesday September 29, 2026 1:00 am ET on KET2
Tuesday September 29, 2026 12:00 am CT on KET2
Sunday September 27, 2026 7:00 pm ET on KET2
Sunday September 27, 2026 6:00 pm CT on KET2
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Thursday September 24, 2026 4:00 pm CT on KET
Wednesday September 23, 2026 9:00 pm ET on KET
Wednesday September 23, 2026 8:00 pm CT on KET

The Battle to Breathe - S53 E9

Tuesday September 22, 2026 1:00 am ET on KET2
Tuesday September 22, 2026 12:00 am CT on KET2
Sunday September 20, 2026 7:00 pm ET on KET2
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Top

What Caused the Dinosaurs to Go Extinct?

Recent Episodes

Evolution: Brain Power

Space Wars

Stone Age Masterpiece

Knowledge Keepers

The Battle to Breathe

Sponsored by:

Clips & Previews

What Caused the Dinosaurs to Go Extinct?

How To Film Great Video With A Phone | NOVA Science Studio

Introducing the NOVA Science Studio Program

Rare Fossil Appears to Show Mammal Attacking Dinosaur

The nation’s first big offshore wind farm is coming

What Made the Titan Submersible Design Unconventional?

Could Whale Poop Help Cool the Planet?

This Fungus Is Spreading Rapidly in Hospitals

There’s Something Living in Wildfire Smoke

How the West Is Making It Rain, With Science

Soothing Science: The Light You See at Sunset

The Mystery and Physics of the Spiral Football Pass

Astronaut Walter Cunningham on the Historic Apollo 7 Mission

Specials

Interview: The Fusion Future with Dennis Whyte

Interview: Talking Dogs, Grumpy Cats, and Animal Communication with Federico Rossano

Interview: How to Save The “Doomsday Glacier” with Brent Minchew

Interview: The Hidden Math Behind Everything with Jordan Ellenberg

Interview: Hobbits, Neanderthals, and Dragon Man with Ella Al-Shamahi

Interview: The Future of AI and Us with Daniela Rus

Interview: Good Anxiety, Exercise, and Connection on the Brain with Wendy Suzuki

Interview: T. Rex to Birds with Steve Brusatte

Interview: Dark Matter = Black Holes? with David Kaiser

Interview: Discovering Dark Energy and the Hubble Tension with Nobel Prize Winner Adam Riess

Interview: Evolution of New Species, Venom, Wings, and More with Sean B. Carroll

Interview: De-Extinction, Dire Wolves, and Jurassic Park with Beth Shapiro

Particles of Thought: The Extremophile’s Guide to Life

Interview: The Animal Translator with Erich Jarvis

Interview: Brain Guru with Heather Berlin

Interview: Bob and Mike’s Big Idea with Bob Hazen and Mike Wong

Interview: Black Hole Badass with Janna Levin

Interview: The Deepfake Detective with Hany Farid

Interview: Mind of a Fossil Hunter with Kirk Johnson

When Machines Prescribe

Sands of Time

Keepers of the Coastline

Tides of Tradition

Standing the Heat

Megadroughts and Indigenous Voices

Harvesting the Future

Sea Change: Survival in the Gulf of Maine

Sea Change: Peril in the Gulf of Maine

Sea Change: Bounty in the Gulf of Maine

When Whales Could Walk (Español)

Ancient Builders of the Amazon (Español)

Ancient Maya Metropolis (Español)

Picture a Scientist (with Audio Description)

Treasures Metals Eiffel Tower

A Labyrinth of Lava

From Mud to Rock

Finding Stromatolites

Stromatolites Were Kings

Ancient Life

Millions of Years Captured in Chalk

A Fourteen-Foot Fish From Kansas

Hell Creek Formation

No Dinosaurs Above the Line

Mammal Survivors

Dinosaur Fossils

King of Gore

Driving Dinosaur Diversity

Pangea

Making Granite From Volcanic Rock

A Massive Volcanic Eruption

Rock Time Capsules

The Sandstone Top of the Canyon

Fossil-Filled Limestone

The Grand Canyon's Oldest Rocks

From Lava to Land

Semi-Precious Pebbles

Five Steps of Volcanic Rock