TED Talks
What if mental health workers responded to emergency calls? | Leslie Herod
When you report an emergency in the US, police, firefighters or paramedics answer the call. What if mental health professionals responded, too? Colorado State Representative Leslie Herod shares a straightforward and research-backed...
3Blue1Brown
Solving the heat equation: Differential Equations - Part 3 of 5
Solving the heat equation.
TED Talks
TED: A climate solution where all sides can win | Ted Halstead
Why are we so deadlocked on climate, and what would it take to overcome the seemingly insurmountable barriers to progress? Policy entrepreneur TED Halstead proposes a transformative solution based on the conservative principles of free...
SciShow
The Most Metal Algorithm in Computer Science
Have a problem with many competing variables? Why not solve it with a computer algorithm based on cooling metal?
3Blue1Brown
The Brachistochrone, with Steven Strogatz: Brachistochrone - Part 1 of 2
A classic problem that Johann Bernoulli posed to famous mathematicians of his time, such as Newton, and how Bernoulli found an incredibly clever solution using properties of light.
SciShow
How Engineers Move Medicine Around the World
Modern medicine has made great strides when it comes to treating and preventing some of the worst diseases in history. But getting that medicine from labs to remote regions presents some interesting engineering challenges.
3Blue1Brown
The Brachistochrone, with Steven Strogatz
A classic problem that Johann Bernoulli posed to famous mathematicians of his time, such as Newton, and how Bernoulli found an incredibly clever solution using properties of light.
SciShow
The Alien Egg Experiment
Hank brings us another simple experiment that demonstrates the important biochemical process of osmosis by turning a chicken egg into a frightening alien-looking thing.
SciShow
Why Scientists Are Using Mice to Make Human Cells
Stem cells are widely believed to hold great promise in medical research because of their ability to transform into all sorts of other cell types, and scientists can grow it in living mice.
TED Talks
TED: How quinoa can help combat hunger and malnutrition | Cedric Habiyaremye
On a mission to create a hunger-free world, agricultural entrepreneur Cedric Habiyaremye makes the case for cultivating quinoa -- and other versatile, nutrient-rich grains -- in places experiencing malnutrition, like his native Rwanda....
SciShow
Can Climate Change Make Lightning… Supercharged?
The oceans absorb a lot of CO2, leading to a variety of effects like ocean acidification. But you might not expect one of those effects: stronger lightning strikes.
PBS
The Assassin Puzzle
Imagine you have a square-shaped room, and inside there is an assassin and a target. And suppose that any shot that the assassin takes can ricochet off the walls of the room, just like a ball on a billiard table. Is it possible to...
MinutePhysics
Complete Solution To The Twins Paradox
This video is about the famous 'Twins paradox' of special relativity, how time can appear to be faster for two different observers at the same time, and which twin really is older (or younger) - the one who stays on earth or the one who...
Crash Course Kids
Bowled Over
So, variables. There are lots of them when trying to test an idea. The trick is to isolate one variable at a time to get reliable results every time. But, how do we do that? In this episode of Crash Course Kids, Sabrina shows us how to...
Crash Course Kids
Try Trials
We've talked about variables and solving problems. But how do we keep working on a problem if the first solution doesn't fix it? Trials! In this episode of Crash Course Kids, Sabrina shows us how to use Trials to figure out what the...
PBS
The Black Hole Information Paradox
Black holes are the result of absolute gravitational collapse of a massive body: a point of hypothetical infinite density surrounded by an event horizon. At that horizon time is frozen and the fabric of space itself cascades inwards at...
TED-Ed
TED-Ed: What is Alzheimer's disease? - Ivan Seah Yu Jun
Alzheimer's disease is the most common cause of dementia, affecting over 40 million people worldwide. And though it was discovered over a century ago, scientists are still grappling for a cure. Ivan Seah Yu Jun describes how Alzheimer's...
3Blue1Brown
Inverse matrices, column space and null space: Essence of Linear Algebra - Part 7 of 15
How do you think about the column space and null space of a matrix visually? How do you think about the inverse of a matrix?
3Blue1Brown
The hardest problem on the hardest test
A geometry/probability question on the Putnam, a famously hard test, about a random tetrahedron in a sphere. This offers an opportunity not just for a lesson about the problem, but about problem-solving tactics in general.
PBS
Instant Insanity Puzzle
Imagine you have four cubes, whose faces are colored red, blue, yellow, and green. Can you stack these cubes so that each color appears exactly once on each of the four sides of the stack?
SciShow
Can Gargling Salt Water Cure a Sore Throat?
Gargling with warm saltwater for a sore throat is a remedy commonly known and loved by doctors, and there is some evidence to back it up, but it’s not a cure.
3Blue1Brown
Who cares about topology? (Inscribed rectangle problem): Topology - Part 1 of 3
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.
TED Talks
Cary Fowler: One seed at a time, protecting the future of food
The wheat, corn and rice we grow today may not thrive in a future threatened by climate change. Cary Fowler takes us inside the Svalbard Global Seed Vault, a vast treasury buried within a frozen mountain in Norway, that stores a diverse...