SciShow
3 Ways Pi Can Explain Practically Everything
What’s irrational and never ends? Pi! Hank explains how we need pi to explain some of the most basic but most important principles of the universe, in honor of Pi Day.
TED-Ed
TED-ED: How to turn protest into powerful change - Eric Liu
We live in an age of protest. On campuses, in public squares, on streets and social media, protestors around the world are challenging the status quo. But while protest is often necessary, is it sufficient? Eric Liu outlines three...
SciShow
Why Do Wet Floors Slip, But Wet Clothes Stick
A freshly-mopped floor is slippery, but a wet shirt is super-clingy... so what's the deal? Why can water make some things slick and other things sticky?
Bozeman Science
Gravitational Mass
In this video Paul Andersen explains how the gravitational mass is a measure of the force on an object in a gravitational field. The gravitational mass is based on the amount of material in an object and can be measured to a standard kg...
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...
Bozeman Science
Gravitational Force
In this video Paul Andersen explains how an object with mass placed in a gravitational field experiences a gravitational force. On the Earth this gravitational force is known as weight. The gravitational force is equal to the product of...
TED-Ed
TED-Ed: Blood, concrete, and dynamite: Building the Hoover Dam | Alex Gendler
In the early 20th century, the US had expanded from coast to coast, but many cities in the southwest still lacked reliable water sources. The Colorado River's erratic flow and frequent floods made it unreliable for agriculture, and the...
SciShow
Can You Rip a Phone Book in Half?
If you can find a phone book these days, science is here to help you rip it in half with your bare hands!
TED-Ed
TED-ED: The mighty mathematics of the lever - Andy Peterson and Zack Patterson
Archimedes once said "Give me a place to stand, and I shall move the Earth." While the idea of a person moving such a huge mass on their own might sound impossible, chances are you've seen this idea in action at your local playground....
SciShow
Portuguese Man o' War: An Organism Made of Organisms?
When is an organism not an organism? Or, when is it a bunch of different organisms living together? SciShow introduces you to the weird world of siphonophores.
Bozeman Science
Free-Body Diagrams
In this video Paul Andersen explains how free-body diagrams can be used to solve kinematics problems. The only two parts of a free-body diagram are the object and all external forces acting on the object. Numerous situations are...
Crash Course
Work, Energy, and Power: Crash Course Physics
When you hear the word, "Work," what is the first thing you think of? Maybe sitting at a desk? Maybe plowing a field? Maybe working out? Work is a word that has a little bit of a different meaning in Physics and today, Shini is going to...
TED-Ed
TED-Ed: How far would you have to go to escape gravity? - Rene Laufer
Every star, black hole, human being, smartphone and atom are all constantly pulling on each other due to one force: gravity. So why don’t we feel pulled in billions of different directions? And is there anywhere in the universe where...
Crash Course Kids
Down to Earth
In this episode of Crash Course Kids, Sabrina talks about why things on the bottom of the Earth, don't just fall off into space. Plus... PENGUINS! This first series is based on 5th grade science. We're super excited and hope you enjoy...
TED-Ed
TED-Ed: The murder of ancient Alexandria's greatest scholar - Soraya Field Fiorio
Dive into the life of one of Ancient Rome’s most powerful figures, Hypatia of Alexandria, a renowned scholar and political advisor to the city's leaders. -- In the city of Alexandria in 415 CE, the bishop and the governor were in a...
Be Smart
Einstein Was Right: Gravitational Waves Edition
A theory of physics 100 years in the making.
TED Talks
Erin McKean: Go ahead, make up new words!
In this fun, short talk from TEDYouth, lexicographer Erin McKean encourages — nay, cheerleads — her audience to create new words when the existing ones won’t quite do. She lists out 6 ways to make new words in English, from compounding...
TED Talks
Steven Pinker: What our language habits reveal
In an exclusive preview of his book The Stuff of Thought, Steven Pinker looks at language and how it expresses what goes on in our minds -- and how the words we choose communicate much more than we realize.
Crash Course Kids
Danger! Falling Objects
So, what would happen if you dropped a hammer and a feather at the same time, from the same height? Well, the hammer would hit the ground first, right? But why? You might think it's because the hammer is heavier, or has more mass than...
Bozeman Science
PS2B - Types of Interactions
Paul Andersen explains how objects interact when touching and at a distance. Electromagnetic forces are very important when objects are touching and fields explain both electromagnetic and gravitational forces. The strong and weak...
Crash Course
What Holds a Country Together or Tears it Apart? Crash Course Geography
Today we’re going to talk about the forces that affect a country’s stability. We’ll take a closer look at Costa Rica, Venezuela, Cuba, and Brazil and examine how the cohesiveness of these Latin American countries varies dramatically even...
Bozeman Science
Equivalence Principle
In this video Paul Andersen explains how inertial mass and gravitational mass are equivalent. He shows you too simple methods for calculated individual inertial mass and gravitational mass. Albert Einstein used this principle to build...
SciShow
What If the Large Hadron Collider Made a Black Hole?
Making a black hole in a particle accelerator sounds… a bit dangerous, to say the least, but scientists think that it could be possible! Here's why it probably wouldn't be dangerous -- and might even teach us something.
TED Talks
TED: A warrior’s cry against child marriage | Memory Banda
Memory Banda’s life took a divergent path from her sister’s. When her sister reached puberty, she was sent to a traditional “initiation camp” that teaches girls “how to sexually please a man.” She got pregnant there — at age 11. Banda,...