MinutePhysics
The Unreasonable Efficiency of Black Holes
This video is about how efficient various reactions are at converting mass to energy (as we know from the Einstein mass-energy equivalence of E=mc^2). Antimatter is very efficient but it is not naturally-occurring. Chemical reactions...
Crash Course
The Fall of Communism: Crash Course European History
The aftermath of the collapse of the Soviet Union and its Warsaw Pact had a huge impact on the countries of Eastern Europe. As the former satellite states turned away from communism and Soviet influence, some of them shifted toward...
Crash Course
Brains Vs. Bias: Crash Course Psychology
In this episode of Crash Course Psychology, Hank takes a look at WAIS and WISC intelligence tests and how bias can really skew both results and the usefulness of those results. -- Table of Contents WAIS & WISC Tests 01:09:22...
SciShow
Bioprecipitation: How Bacteria Makes Snow
Raindrops and snowflakes generally start to form around something else in the air, like a speck of dust, but sometimes that something else is bacteria.
Crash Course
Climate Change, Chaos, and The Little Ice Age - Crash Course World History 206
In which John Green teaches you about the Little Ice Age. The Little Ice Age was a period of global cooling that occurred from the 13th to the 19th centuries. This cooling was likely caused by a number of factors, including unusual solar...
SciShow Kids
Where Does Frost Come From? | Winter Science | SciShow Kids
If you've ever gone outside really early on a cold day in fall, you might have seen a thin layer of sparkly ice crystals covering everything! That ice is called frost, and it can only form if the weather is exactly right!
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SciShow Kids
Why Do We Have Baby Teeth?
Have you ever lost a tooth? Or maybe you have teeth that are getting a little wiggly? It's all part of growing up! Join Jessi and Squeaks to learn why we lose our baby teeth and how we can take care of our new permanent teeth! Say cheese!
SciShow
Breast Cancer gets Worse in the Spring and Fall. But...Why?
Seasonal illnesses from infectious diseases aren’t a new concept, but a few decades ago public health experts began to notice the same behavior in some non-infectious diseases like breast cancer. These patterns have helped us learn a lot...
TED Talks
TED: Why Libya's revolution didn't work -- and what might | Zahra' Langhi
In Libya, Zahra' Langhi was part of the "days of rage" movement that helped topple the dictator Gaddafi. But -- then what? In their first elections, Libyans tried an innovative slate of candidates, the "zipper ballot," that ensured equal...
SciShow
Do Dead Batteries Really Bounce?
Some people have this idea that dead batteries bounce if you drop them, but is it true?
Bozeman Science
Calculating the Gravitational Force
In this video Paul Andersen explains why astronauts are weightless. He also explains how Newton's Universal Law of Gravitation can be used to calculate the gravitational force between objects.
SciShow
Were the Planets Always in the Same Order?
Four rocky inner planets and four gaseous outer planets - makes sense, right? But when astronomers turned their eyes to planets beyond our star system they found out that many systems are set up differently. Why?
Be Smart
What Do Raindrops Really Look Like?
What do raindrops look like? Exactly how we drew them as kids, right? Wrong! Teardrop-shaped rain is physically impossible. This week I went inside a vertical wind tunnel to bring you the true shape of rain.
SciShow
This Might Be a Brand-New Kind of Star | Space News
Astronomers have theorized about an invisible star made up of theoretic particles in the past, but did we recently detect the gravitational waves of two of them colliding? Plus, extraterrestrial rocks from a decades-old mission keep...
Crash Course
Things Fall Apart, Part 2: Crash Course Literature 209
In which John Green concludes teaching you about Chinua Achebe's Things Fall Apart. You'll learn about the historical contexts of Things Fall Apart, including 19th century colonization and 20th century decolonization. We're going to...
SciShow
Hottest Year Ever, and Amazing Gecko-Man Getup!
SciShow News explains the latest climate weirdness, and why the Global Warming Hiatus wasn’t really what it sounded like. Plus, see how humans have harnessed the climbing power of the gecko!
SciShow
Weird Places Devil's Kettle Falls
A waterfall that seems to just disappear into the ground sounds pretty unbelievable, but scientists are still bewildered by the mysteries of Devil's Kettle Falls.
SciShow
Something Is Creating and Removing Oxygen on Mars - SciShow News
Oxygen levels in the Martian atmosphere are mysteriously inconsistent, and scientists don’t have a clear explanation for what’s behind the changes. Meanwhile, scientists DO have explanations for the tiger-like stripes on one of Saturn’s...
PBS
How Time Becomes Space Inside a Black Hole
Find out how time and space switch roles when we move beyond the event horizon of the black hole.
SciShow
How to Find Thousands of Oceanic Fossils in... Ohio?
Modern-day Ohio is more than 600 kilometers from the ocean - yet it has thousands of ocean fossils dating back to the Ordovician, giving us a glimpse at its past under an ancient, fishless sea.
TED Talks
iO Tillett Wright: Fifty shades of gay
iO Tillett Wright has photographed 2,000 people who consider themselves somewhere on the LGBTQ spectrum -- and asked many of them: Can you assign a percentage to how gay or straight you are? Most people, it turns out, consider themselves...