TED Talks
An election system that puts voters (not politicians) first | Amber McReynolds
From hours-long lines and limited polling locations to confusing and discriminatory registration policies, why is it so hard to vote in the US? Voting rights expert Amber McReynolds offers a proven alternative: a new process, already...
SciShow
Can Pets Be Allergic to People?
Maybe you have a dog or cat who greets you with a sneezing fit once you walk in the door from work. Is it possible you're the problem?
TED Talks
Ashwin Naidu: The link between fishing cats and mangrove forest conservation
Mangrove forests are crucial to the health of the planet, gobbling up CO2 from the atmosphere and providing a home for a diverse array of species. But these rich habitats are under continual threat from deforestation and industry. In an...
SciShow
Why Athletes Choke Under Pressure
Even the most skilled athletes, musicians, and performers can make mistakes on relatively simple tasks, so what’s happening in our brains when we choke, and is there something we can do to overcome these moments?
TED Talks
Juna Kollmeier: The most detailed map of galaxies, black holes and stars ever made
Humans have been studying the stars for thousands of years, but astrophysicist Juna Kollmeier is on a special mission: creating the most detailed 3-D maps of the universe ever made. Journey across the cosmos as she shares her team's work...
TED Talks
Stanley McChrystal: Listen, learn ... then lead
Four-star general Stanley McChrystal shares what he learned about leadership over his decades in the military. How can you build a sense of shared purpose among people of many ages and skill sets? By listening and learning -- and...
Curated Video
Columbus, de Gama, and Zheng He! 15th Century Mariners. Crash Course: World History
In which John Green teaches you about the beginning of the so-called Age of Discovery. You've probably heard of Christopher Columbus, who "discovered" America in 1492, but what about Vasco da Gama? How about Zheng He? Columbus gets a bad...
Be Smart
There Was No First Human
If you traced your family tree back 185 million generations, you wouldn't be looking at a human, a primate, or even a mammal. You'd be looking at a fish. So where along that line does the first human show up? The answer may surprise you
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...
SciShow
How Far Will People Go to Fit In?
Have you ever gone along with a group even though you had your doubts? You're not alone: Research shows unanimous decisions aren't always actually unanimous.
TED-Ed
TED-Ed: The fundamentals of space-time: Part 1 - Andrew Pontzen and Tom Whyntie
Space is where things happen. Time is when things happen. And sometimes, in order to really look at the universe, you need to take those two concepts and mash them together. In this first lesson of a three-part series on space-time,...
3Blue1Brown
The other way to visualize derivatives
A visual for derivatives which generalizes more nicely to topics beyond calculus. Thinking of a function as a transformation, the derivative measure how much that function locally stretches or squishes a given region.
3Blue1Brown
Nonsquare matrices as transformations between dimensions: Essence of Linear Algebra - Part 8 of 15
How do you think about a non-square matrix as a transformation?
Crash Course Kids
Space Compilation
Maybe you'd like to just hear about one topic for a while. We understand. Thus, we've created our Compilation Series. In this video, we look at some of our videos about Space. Sabrina talks to us about the Sun, stars, the universe, and...
SciShow
This Illusion Might Not Work Depending on Where You're From
Optical illusions are a fun way to play with the way your brain interprets what your eyes see, but if some of them don't work for you, it might be because of where you live.
TED Talks
TED: Nerdcore comedy | Ze Frank
Performer and web toymaker Ze Frank delivers a hilarious nerdcore standup routine, then tells us what he's seriously passionate about: helping people create and interact using simple, addictive web tools.
PBS
Can You Trust Your Eyes in Spacetime?
Last time we talked about what curvature means, looked at geodesics, great circles on spheres, and tried to understand the notion of "straightness". This week on Spacetime, we take a detour into how geometry works in spacetime. Get...
TED-Ed
TED-ED: What's an algorithm? - David J. Malan
An algorithm is a method of solving problems both big and small. Though computers run algorithms constantly, humans can also solve problems with algorithms. David J. Malan explains how algorithms can be used in seemingly simple...
3Blue1Brown
Who cares about topology? (Inscribed rectangle problem)
This is an absolutely beautiful piece of math. It shows how certain ideas from topology, such as the mobius strip, can be used to solve a slightly softer form of an unsolved problem in geometry.
3Blue1Brown
But WHY is a sphere's surface area four times its shadow?
Two proofs for the surface area of a sphere
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.
SciShow
Why Herpes Is the Most Talented Virus Ever
Unlike with many other viruses, once you get a herpesvirus you’re stuck with it for life. But just how do these master trespassers accomplish this feat?
Crash Course
Mitosis: Splitting Up is Complicated - Crash Course Biology
Hank describes mitosis and cytokinesis - the series of processes our cells go through to divide into two identical copies.