Mathematician Kelsey Houston-Edwards offers ambitious content for viewers that are eager to attain a greater understanding of the world around them. Math is pervasive - a robust yet precise language - and with each episode you’ll begin to see the math that underpins everything in this puzzling, yet fascinating, universe.

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Extra Life: A Short History of Living Longer
Most Recent

Episode
7:51
Infinite Series
A Breakthrough in Higher Dimensional Spheres

Episode
7:28
Infinite Series
The Multiplication Multiverse

Episode
7:39
Infinite Series
Are Prime Numbers Made Up?

Episode
8:21
Infinite Series
Associahedra: The Shapes of Multiplication

Episode
8:35
Infinite Series
How Many Humans Have the Same Number of Body Hairs?

Episode
8:04
Infinite Series
A Hierarchy of Infinities

Episode
8:02
Infinite Series
This Video was Not Encrypted with RSA

Episode
8:45
Infinite Series
Can You Solve the Poison Wine Challenge?

Episode
10:21
Infinite Series
Topology vs "a" Topology

Episode
10:35
Infinite Series
Can We Hear Shapes?

Episode
9:36
Infinite Series
The Mathematics of Diffie-Hellman Key Exchange

Episode
11:31
Infinite Series
When Pi is Not 3.14
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Full Episodes
Season

Episode
9:12
Infinite Series
The Assassin Puzzle
Can you save the target from his assassin in a square room with bouncy walls?

Episode
9:32
Infinite Series
Instant Insanity Puzzle
Can you stack four colored cubes so that each color only shows once on each side?

Episode
10:31
Infinite Series
Defining Infinity
Set theory is the foundation of all of mathematics. How does it handle infinity?

Episode
9:36
Infinite Series
Unraveling DNA with Rational Tangles
When you think about math, what do you think of knots? Probably... knot.

Episode
13:02
Infinite Series
How Big are All Infinities Combined? (Cantor's Paradox)
Infinities come in different sizes. So what's the right way to describe the sum?

Episode
10:21
Infinite Series
The Geometry of SET
In SET, what is the maximum number of cards you can deal that might not contain a SET?

Episode
10:50
Infinite Series
What was Fermat’s “Marvelous" Proof?
If Fermat had a little more room in his margin, what proof would he have written there?

Episode
10:07
Infinite Series
What are Numbers Made of?
In the physical world, objects are made of simpler parts. What are numbers made of?

Episode
9:35
Infinite Series
What Does It Mean to Be a Number? (The Peano Axioms)
Could you explain numbers to someone without using the notion of a number?

Episode
7:17
Infinite Series
Telling Time on a Torus
What shape do you most associate with a standard analog clock? Circle or... torus?
Science & Nature

Preview
0:30
Extra Life: A Short History of Living Longer
Preview

Episode
56:53
Canyons & Ice: The Last Run of Dick Griffith
CANYONS & ICE: The Last Run of Dick Griffith

Preview
0:30
Human: The World Within
Episode 6 Preview | React

Preview
0:30
Human: The World Within
Episode 1 Preview | Birth

Clip
2:46
Human: The World Within
Proprioception - The Sixth Sense

Clip
2:45
Human: The World Within
Engineering Lost Function Inside the Body

Clip
5:09
Life at the Waterhole
Face-to-face with an Elephant

Clip
2:54
Life at the Waterhole
Herd Love Is In the Air

Clip
3:00
Life at the Waterhole
Insects Swarm and a Family Nests

Clip
2:32
Life at the Waterhole
A Spotted Hyena Arrives

Clip
4:38
Greta Thunberg: A Year to Change the World
Direct Air Capture

Clip
4:23
Greta Thunberg: A Year to Change the World
COVID-19's Impact on Climate

Clip
3:55
Greta Thunberg: A Year to Change the World
Reindeer Face Starvation

Clip
4:25
Greta Thunberg: A Year to Change the World
Athabasca Glacier

Clip
2:16
Extinction: The Facts
The Last Two White Rhinos

Preview
0:30
Extinction: The Facts
Trailer

Special
Extinction: The Facts
Extinction: The Facts

Episode
48:30
Europe's New Wild
The Missing Lynx
Episode
48:30
Europe's New Wild
Return of the Titans

Preview
0:30
Europe's New Wild
Episode 4 Preview | Europe's Amazon

Preview
0:30
Europe's New Wild
Episode 2 Preview | Return of the Titans

Episode
55:47
When Disaster Strikes
A Perfect Storm

Episode
55:16
When Disaster Strikes
Paradise Lost

Episode
55:13
When Disaster Strikes
The Silent Killer

Preview
0:30
When Disaster Strikes
Episode 3 Preview | Paradise Lost

Special
The Brain Revolution
The Brain Revolution

Episode
5:21
Human Elements
Think Like an Octopus

Episode
6:08
Human Elements
The Translator

Episode
5:58
Human Elements
Tracking Invisible Cats

Episode
5:26
Human Elements