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Deadliest Tornadoes

Deadliest Tornadoes

In 2011, the worst tornado season in decades left a trail of destruction across the U.S., killing more than 550 people. Why was there such an extreme outbreak? How do such outbreaks form? With modern warning systems, why did so many die? Is our weather getting more extreme - and if so how bad will it get?
S39 E10 Length 53:45 Premiere: 4.10.12

Program Details

NOVA

About NOVA

NOVA brings you stories from the frontlines of science and engineering, answering the big questions of today and tomorrow, from how our ancestors lived, to whether parallel universes exist, to how technology will transform our lives. Visit the official website to watch full-length documentaries, or explore our world through short-form video, on our digital publication NOVA Next.

TV Schedules

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Upcoming

Secrets of the Forbidden City - S44 E15

Explore the ingenious engineering of Beijing's Forbidden City, the power center of imperial China.

  • Tuesday December 8, 2020 3:00 am ET on KET2
  • Tuesday December 8, 2020 2:00 am CT on KET2

Bird Brain - S44 E20

Join scientists as they test avian aptitude with a series of challenging brainteasers, and discover how the genius of birds is leading us to reconsider the definition of intelligence.

  • Wednesday December 9, 2020 9:00 pm ET on KET
  • Wednesday December 9, 2020 8:00 pm CT on KET
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Einstein's Quantum Riddle - S46 E2

Physicists capture light from across the universe in a bid to prove Einstein's quantum entanglement.

  • Wednesday December 16, 2020 9:00 pm ET on KET
  • Wednesday December 16, 2020 8:00 pm CT on KET
  • Thursday December 17, 2020 1:00 pm ET on KET
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  • Tuesday December 22, 2020 3:00 am ET on KET2
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Pluto and Beyond - S46 E1

Join the mission as the New Horizons spacecraft attempts to fly by NASA's most distant target yet. Since it explored Pluto in 2015, New Horizons is zooming toward Ultima Thule, an object four billion miles from Earth.

  • Wednesday December 23, 2020 9:00 pm ET on KET
  • Wednesday December 23, 2020 8:00 pm CT on KET
  • Thursday December 24, 2020 1:00 pm ET on KET
  • Thursday December 24, 2020 12:00 pm CT on KET
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  • Sunday December 27, 2020 7:00 pm ET on KET2
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  • Tuesday December 29, 2020 3:00 am ET on KET2
  • Tuesday December 29, 2020 2:00 am CT on KET2

Decoding the Great Pyramid - S46 E4

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

  • Sunday January 3, 2021 7:00 pm ET on KET2
  • Sunday January 3, 2021 6:00 pm CT on KET2

The Impossible Flight - S45 E3

Two intrepid pilots attempt to construct and fly the first solar-powered airplane around the world.

  • Wednesday December 30, 2020 9:00 pm ET on KET
  • Wednesday December 30, 2020 8:00 pm CT on KET
  • Thursday December 31, 2020 1:00 pm ET on KET
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  • Friday January 1, 2021 2:00 am ET on KET
  • Friday January 1, 2021 1:00 am CT on KET
  • Tuesday January 5, 2021 3:00 am ET on KET2
  • Tuesday January 5, 2021 2:00 am CT on KET2
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Secrets of the Forbidden City - S44 E15

  • Thursday December 3, 2020 1:00 pm ET on KET
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First Man on the Moon - S41 E22

  • Tuesday December 1, 2020 2:00 pm ET on KET
  • Tuesday December 1, 2020 1:00 pm CT on KET

Saving Notre Dame

  • Friday November 27, 2020 2:00 am ET on KET
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Building Wonders: Hagia Sophia - Istanbul's Ancient Mystery - S42 E4

  • Tuesday November 24, 2020 3:00 am ET on KET2
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Petra - Lost City of Stone - S42 E5

  • Tuesday November 17, 2020 3:00 am ET on KET2
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Colosseum - Roman Death Trap - S42 E6

  • Tuesday November 10, 2020 3:00 am ET on KET2
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Can We Cool the Planet?

  • Tuesday November 3, 2020 3:00 am ET on KET2
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Top

Season 39

Episodes

Season 39 Episodes

Inside the Megastorm

S39 E16 Length 53:37 Premiere Date 11.18.12

Why Ships Sink

S39 E11 Length 52:53 Premiere Date 4.17.12

Deadliest Tornadoes

S39 E10 Length 53:45 Premiere Date 4.10.12

Hunting the Elements

S39 E6 Length 1:53:50 Premiere Date 4.3.12

Deadliest Volcanoes

S39 E1 Length 52:45 Premiere Date 1.3.12

Clips and Previews

Season 39 Clips and Previews

Deadliest Tornadoes Preview

Preview Length 00:30 Premiere Date 4.10.12

Surviving an Elevator Fall

Clip Length 01:31 Premiere Date 8.23.10

Shabbat Elevator

Clip Length 02:42 Premiere Date 8.23.10

Six Questions with David Pogue

Clip Length 02:33 Premiere Date 1.4.11

A Mind for Music

Clip Length 04:05 Premiere Date 2.9.11

Modeling a Comet Airburst

Clip Length 03:20 Premiere Date 2.9.11

Green Energy in China

Clip Length 05:09 Premiere Date 4.12.11

A Strict Carbon Diet

Clip Length 02:58 Premiere Date 4.12.11

Brian Greene Answers Your Questions

Clip Length 01:07 Premiere Date 8.2.11

The 9/11 Memorial Mock-Up

Clip Length 01:54 Premiere Date 8.24.11

Solving an Engineering Problem

Clip Length 02:49 Premiere Date 8.24.11

Walls of Glass

Clip Length 02:29 Premiere Date 8.24.11

The Memorial Plaques

Clip Length 02:31 Premiere Date 8.24.11

Specials

Treasures Metals Eiffel Tower

Length 02:09 Premiere Date 12.9.16

A Labyrinth of Lava

Length 01:13 Premiere Date 11.2.15

Driving Dinosaur Diversity

Length 01:47 Premiere Date 10.22.15

Pangea

Length 00:56 Premiere Date 10.22.15

Making Granite From Volcanic Rock

Length 02:16 Premiere Date 10.22.15

A Massive Volcanic Eruption

Length 01:14 Premiere Date 10.22.15

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

Length 01:40 Premiere Date 10.22.15

Dinosaur Fossils

Length 01:53 Premiere Date 10.22.15

King of Gore

Length 02:00 Premiere Date 10.22.15

Manhattan Skyline

Length 00:52 Premiere Date 10.21.15

New York's Mountains

Length 01:13 Premiere Date 10.21.15

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

Length 00:19 Premiere Date 10.21.15

From Lava to Land

Length 02:14 Premiere Date 10.21.15

Semi-Precious Pebbles

Length 00:57 Premiere Date 10.21.15

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

Grand Canyon 4

Length 00:19 Premiere Date 8.2.15

Mendenhall Glacier

Length 02:51 Premiere Date 8.2.15

Monument Rocks 1

Length 01:18 Premiere Date 8.2.15

Monument Rocks 2

Length 01:48 Premiere Date 8.2.15

Exuma Cays 1

Length 01:26 Premiere Date 8.2.15

Exuma Cays 3

Length 00:28 Premiere Date 8.2.15

Exuma Cays 4

Length 03:22 Premiere Date 8.2.15

Gooseberry Falls 1

Length 00:57 Premiere Date 8.2.15

Gooseberry Falls 2

Length 00:24 Premiere Date 8.2.15

Gooseberry Falls 3

Length 01:06 Premiere Date 8.2.15

Gooseberry Falls 4

Length 01:01 Premiere Date 8.2.15

Mount Kilauea

Length 01:30 Premiere Date 8.2.15

Grand Canyon 1

Length 01:19 Premiere Date 8.2.15

Grand Canyon 2

Length 01:05 Premiere Date 8.2.15

Grand Canyon 3

Length 00:58 Premiere Date 8.2.15

Lethal Seas Excerpt 1

Length 04:11 Premiere Date 5.12.15

Lethal Seas Excerpt 2

Length 01:00 Premiere Date 5.12.15

Lethal Seas Excerpt 3

Length 00:35 Premiere Date 5.12.15

Lethal Seas Excerpt 4

Length 00:51 Premiere Date 5.12.15

The Mother of Hubble

Length 02:28 Premiere Date 4.14.15

Formation of a Typhoon

Length 01:34 Premiere Date 6.25.14

Flatfish Larvae

Length 00:51 Premiere Date 5.6.14

RNAi Explained

Length 01:47 Premiere Date 4.22.14

Dolphin Mirror

Length 03:18 Premiere Date 4.22.14

Dogs' Sense of Time

Length 01:28 Premiere Date 4.13.14

Cockatoo Excerpt

Length 01:30 Premiere Date 4.8.14

How Solar Cells Work

Length 00:33 Premiere Date 2.26.14

Solar Power's Promise

Length 00:51 Premiere Date 2.26.14

Microneedle

Length 01:41 Premiere Date 12.30.13

Non-Newtonian Gel

Length 01:00 Premiere Date 11.15.13

GM Plants

Length 01:27 Premiere Date 11.15.13

Soft-Story Buildings

Length 07:36 Premiere Date 11.13.13

Levitation

Length 00:50 Premiere Date 10.24.13

Superconductor

Length 01:47 Premiere Date 10.24.13

Animal Robot 1

Length 02:35 Premiere Date 10.24.13

Animal Robot 2

Length 02:02 Premiere Date 10.24.13

Therapeutic Hypothermia

Length 01:11 Premiere Date 10.24.13

Therapeutic Hypothermia 2

Length 01:07 Premiere Date 10.24.13

Therapeutic Hypothermia 3

Length 01:43 Premiere Date 10.24.13

Therapeutic Hypothermia 4

Length 02:01 Premiere Date 10.24.13

Swarming Robots

Length 01:31 Premiere Date 10.21.13

Sneak Peek: Making Stuff Wilder

Length 06:14 Premiere Date 10.21.13

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

Length 00:38 Premiere Date 10.19.13

Earthquake Test

Length 02:03 Premiere Date 10.19.13

David Drives

Length 01:27 Premiere Date 10.19.13

Virus Battery

Length 02:21 Premiere Date 10.19.13

Shelley

Length 02:07 Premiere Date 10.19.13

Robot Arm

Length 00:56 Premiere Date 10.19.13

Elephant Arm

Length 01:22 Premiere Date 10.19.13

FinGripper

Length 00:55 Premiere Date 10.19.13

Hagfish Defense

Length 01:36 Premiere Date 10.17.13

Slime Clothes

Length 01:00 Premiere Date 10.17.13

Pitcher Plant

Length 01:48 Premiere Date 10.17.13

SLIPS

Length 01:01 Premiere Date 10.17.13

Hagfish

Length 00:51 Premiere Date 10.17.13

New York City One Year Later: Telecommunications

Length 03:14 Premiere Date 10.16.13

Sneak Peek: Making Stuff Faster

Length 05:06 Premiere Date 10.15.13

David's Race

Length 01:28 Premiere Date 10.15.13

Steffen's Plan

Length 01:59 Premiere Date 10.15.13

Traveling Salesman

Length 01:21 Premiere Date 10.15.13

Eye Robot

Length 01:51 Premiere Date 10.10.13

Corkscrew Robot

Length 00:32 Premiere Date 10.10.13

Slow Goldfish

Length 01:39 Premiere Date 10.10.13

Bee Toxin

Length 01:31 Premiere Date 10.10.13

Mild Traumatic Brain Injury

Length 03:36 Premiere Date 10.7.13

Invisibility Cloak

Length 01:22 Premiere Date 9.24.13

Shape Memory Alloys

Length 00:32 Premiere Date 9.8.13

Jellyfish

Length 00:38 Premiere Date 9.8.13

Bird Wings

Length 01:56 Premiere Date 9.8.13

Shrinking Chips

Length 01:06 Premiere Date 9.5.13

Pizza Transistor

Length 01:34 Premiere Date 9.5.13

Graphene

Length 01:11 Premiere Date 9.5.13

Wheat Straw Plastic

Length 01:04 Premiere Date 8.29.13

Solar Leaves

Length 00:53 Premiere Date 8.29.13

Battle Jacket

Length 01:49 Premiere Date 8.29.13

Oobleck

Length 00:40 Premiere Date 8.29.13

Magnetic Oobleck

Length 00:54 Premiere Date 8.29.13

Life-Saving Non-Newtonian Fluids

Length 01:43 Premiere Date 8.29.13

Silicon Transistors

Length 00:50 Premiere Date 8.29.13

Starling 8

Length 00:44 Premiere Date 7.15.13

sandy-raw-1-2

Length 00:04 Premiere Date 7.8.13

sandy-raw-5-1

Length 01:02 Premiere Date 7.8.13

Chemotherapy Goes Small

Length 01:17 Premiere Date 7.1.13

The Making of a Cloud Old

Length 03:10 Premiere Date 6.30.13

Why So Many Cloud Types?

Length 03:35 Premiere Date 6.30.13

Clouds and Weather

Length 03:21 Premiere Date 6.30.13

Severe Storms

Length 03:37 Premiere Date 6.30.13

The Climate Wild Card

Length 03:02 Premiere Date 6.30.13

Life on Europa?

Length 02:25 Premiere Date 6.9.13

CloudLab_Megastorm_03

Length 01:41 Premiere Date 5.29.13

CloudLab_Megastorm_04

Length 01:43 Premiere Date 5.29.13

CloudLab_Megastorm_05

Length 01:04 Premiere Date 5.29.13

CloudLab_Megastorm_06

Length 00:40 Premiere Date 5.29.13

CloudLab_Megastorm_07

Length 03:07 Premiere Date 5.29.13

CloudLab_Megastorm_01

Length 00:35 Premiere Date 5.28.13

CloudLab_Megastorm_02

Length 00:31 Premiere Date 5.28.13

What Made the 1918 Flu So Deadly?

Length 01:28 Premiere Date 5.13.13

How the 1918 Flu Infected People

Length 00:25 Premiere Date 5.13.13

Fertilizing the Amazon

Length 03:27 Premiere Date 4.21.13

Flu Probabilities

Length 01:53 Premiere Date 4.16.13

Rare Earth Elements

Length 04:17 Premiere Date 4.1.13

CHNOPS: Ingredients for Life

Length 02:36 Premiere Date 3.12.13

Electromagnetic Spectrum

Length 00:44 Premiere Date 2.28.13

MODIS Sensor

Length 00:26 Premiere Date 2.28.13

Solving the Storage Problem

Length 02:26 Premiere Date 10.25.12

Putting Energy to Use Old

Length 02:14 Premiere Date 10.8.12

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