PBS
Network Mathematics and Rival Factions | Infinite Series
The theory of social networks allows us to mathematically model and analyze the relationships between governments, organizations and even the rival factions warring on Game of Thrones.
PBS
The Leap Second Explained
Every once in a while we add a second onto our days. Similar to the Leap Year, this is known as the Leap Second. But, if the Leap Year already helps us account for the offset from a calendar in days, what exactly does the Leap Second do?...
TED-Ed
TED-Ed: What's the definition of comedy? Banana. - Addison Anderson
What makes us giggle and guffaw? The inability to define comedy is its very appeal; it is defined by its defiance of definition. Addison Anderson riffs on the philosophy of Henri Bergson and Aristotle to elucidate how a definition draws...
TED Talks
Tom Honey: Why would God create a tsunami?
In the days following the tragic South Asian tsunami of 2004, the Rev. Tom Honey pondered the question, "How could a loving God have done this?" Here is his answer.
TED Talks
Feisal Abdul Rauf: Lose your ego, find your compassion
Imam Faisal Abdul Rauf combines the teachings of the Qur'an, the stories of Rumi, and the examples of Muhammad and Jesus, to demonstrate that only one obstacle stands between each of us and absolute compassion -- ourselves.
TED Talks
Ge Wang: The DIY orchestra of the future
Ge Wang makes computer music, but it isn't all about coded bleeps and blips. With the Stanford Laptop Orchestra, he creates new instruments out of unexpected materials—like an Ikea bowl—that allow musicians to play music that's both...
SciShow
World's Most Asked Questions What is the Meaning of Life
People ask Google everything under the sun. One of the most commonly searched questions in the world is “What Is the Meaning of Life?” Let SciShow explain.
TED-Ed
TED-ED: Mysteries of vernacular: Fizzle - Jessica Oreck and Rachael Teel
From a stinky and crude inception, the word fizzle's history is nothing to poo poo at. Jessica Oreck and Rachael Teel track the road from flatulence to its modern meaning of a failure or weak ending.
3Blue1Brown
Limits, L'Hôpital's rule, and epsilon delta definitions | Essence of calculus, chapter 7
What are limits? How are they defined? How are they used to define the derivative? What is L'Hospital's rule?
PBS
Can a Circle Be a Straight Line?
On this week's episode of Spacetime, Gabe talks about what it actually means for a line to be straight so we can better understand what we mean by the idea of "curved Spacetime". This is Part One of our series on General relativity, so...
TED Talks
TED: The value of kindness at work | James Rhee
Kindness can go a long way when it comes to reshaping a business. Having saved a fashion company from the brink of bankruptcy, entrepreneur James Rhee shares the value of investing in a culture of compassion at work -- and shows why we...
3Blue1Brown
What does genius look like in math? Where does it come from? (Dandelin spheres)
A beautiful proof of why slicing a cone gives an ellipse.
TED Talks
TED: How animals and plants are evolving in cities | Menno Schilthuizen
In cities, evolution occurs constantly, as countless plants, animals and insects adapt to human-made habitats in spectacular ways. Evolutionary biologist Menno Schilthuizen calls on peculiar beings such as fast food-loving mice and...
Bozeman Science
Neutralization Reaction
In a neutralization reaction (or acid-base reaction) a proton is transferred from the Brinsted--Lowry acid to the Brinsted--Lowry base. Water is amphoteric and so it can serve as either an acid or a base in a neutralization reaction. The...
Crash Course
What Is Myth? Crash Course World Mythology
Welcome to Crash Course World Mythology, our latest adventure (and this series may be literally adventurous) in education. Over the next 40 episodes or so, we and Mike Rugnetta are going to learn about the world by looking at the...
3Blue1Brown
Limits, L'Hopital's rule, and epsilon delta definitions: Essence of Calculus - Part 7 of 11
What are limits? How are they defined? How are they used to define the derivative? What is L'Hospital's rule?
SciShow
How Much Junk Is in Your DNA Trunk?
The human genome is 3.2 billion base pairs long and contains around 20,000 genes, but how much of that is garbage?
Bozeman Science
Speed, Velocity, and Acceleration
Mr. Andersen explains the basic quantities of motion. Demonstration videos and practice problems are also included. The difference between scalar and vector quantities is also discussed.
SciShow
Pluto: Still Not A Planet
The ESA is working on a 'fresh-squeezed' spacecraft that will explore Jupiter's moons, and the New Horizons team makes a case for Pluto (and many others)!
TED Talks
TED: How to speak so that people want to listen | Julian Treasure
Have you ever felt like you're talking, but nobody is listening? Here's Julian Treasure to help. In this useful talk, the sound expert demonstrates the how-to's of powerful speaking -- from some handy vocal exercises to tips on how to...
SciShow
Why's a Meter a Meter?
Meter is the standard unit of length used by most countries around the world. But how did they define it?
Be Smart
Why It Is What Time It Is (The History of Time)
How did we come up with our system of telling time? Why do we divide the day into 24 hours of 60 minutes each, and put 60 seconds in each minute? Where does the definition of a second come from? And who decides what clock shows the...
3Blue1Brown
Why slicing a cone gives an ellipse
A beautiful proof of why slicing a cone gives an ellipse.
3Blue1Brown
Ever wondered why slicing a cone gives an ellipse? It’s wonderfully clever!
A beautiful proof of why slicing a cone gives an ellipse.