TED Talks
TED: How to be fearless in the face of authoritarianism | Sviatlana Tsikhanouskaya
How do you stand up to authoritarianism? And what does it mean to be "fearless"? In this powerful talk, housewife-turned-politician Sviatlana Tsikhanouskaya describes her unlikely bid to defeat Belarus's long-time autocratic leader in...
Crash Course
Cycles in the Sky
This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.
TED Talks
Harsha Bhogle: The rise of cricket, the rise of India
The tale of a major global cultural phenomenon: Cricket commentator Harsha Bhogle describes the spectacular arrival of fast-paced 20-20 cricket as it parallels the rise of modern India. He traces the game from its sleepy English roots to...
Crash Course
Alchemy: History of Science
In fantasy stories, charlatans in fancy robes promise to turn lead into gold. But real alchemists weren’t just mystical misers. They were skilled experimentalists, backed by theories of matter. And they played a huge role in the...
SciShow
How a Butterfly’s Wingbeat CAN Change the Weather
You may have heard of the butterfly effect, where butterflies flapping their wings somehow cause tornadoes. Although it seems pretty unlikely, butterflies can affect the weather, just not in the way you might think.
MinutePhysics
GPS, Relativity, and Nuclear Detection
GPS is just a big clock in space! (and it can detect nuclear explosions)
Be Smart
Why Does February Have 28 Days?
Why does February only get 28 days when all the other months get 30 or 31? The answer is part superstition, part politics, and parts astronomy. Basically, it's the Romans' fault.
Crash Course
Taste & Smell: Crash Course A&P
Hank resists the urge to devour a slice of pizza so that he can walk you through the way we experience our major special senses. It all boils down to one thing: sensory cells translating chemical, electromagnetic, and mechanical stimuli...
TED-Ed
TED-Ed: The Romans flooded the Colosseum for sea battles - Janelle Peters
Starting in 80 CE, residents of Rome and visitors from across the Roman Empire would fill the stands of the Colosseum to see gladiators duel, animals fight and chariots race around the arena. And for the grand finale, water poured into...
SciShow
5 Body Hacks for When You’re Sick
No matter how healthy you are, you likely end up feeling sick at least a few times a year. And we have many pharmaceutical options these days to help us feel better. But some non-pharmaceutical remedies are supported by science,...
SciShow
A Brief History of Birth Control
Gym teacher Hank gives us the full story of the past, present, and future of birth control.
SciShow
What Do Food Expiration Dates Actually Mean?
Sell By, Best By, and Use By... do these dates actually tell you anything? Food science can be tricky, but we're here to clear some of it up.
Be Smart
What This Chart Actually Means for COVID-19
Stay informed. Stay cautious, but not scared. Listen to scientists and public health officials and follow their guidance. By protecting yourself, you’re protecting the most vulnerable among us. Together we can flatten the curve on...
Crash Course
How to Engineer Health - Drug Discovery & Delivery: Crash Course Engineering #36
Engineers are problem solvers, and our own health is full of problems to be engineered. In this episode we discuss drug discovery and drug delivery. We’ll explore everything from classical and reverse pharmacology to the new field of...
TED-Ed
TED-Ed: If superpowers were real, which would you choose? - Joy Lin
In this series, Joy Lin tackles six superpowers and reveals just how scientifically realistic they can be to us mere mortals.
SciShow
How Close Are We to the Perfect Deepfake?
Thanks to deepfakes, CGI can be more realistic and even amateurs can easily create some fun footage. But there are also sinister uses out there.
TED Talks
TED: The world's most boring television ... and why it's hilariously addictive | Thomas Hellum
You've heard about slow food. Now here's slow ... TV? In this very funny talk, Norwegian television producer Thomas Hellum shares how he and his team began to broadcast long, boring events, often live -- and found a rapt audience. Shows...
Crash Course
When Predictions Succeed - Crash Course Statistics
In our series finale, we're going to take a look at some of the times we've used statistics to gaze into our crystal ball, and actually got it right! We'll talk about how stores know what we want to buy (which can sometimes be a good...
Be Smart
Putting Hurricane Harvey In Perspective
How do we comprehend a storm like Hurricane Harvey? Let's put it into perspective.
SciShow
Top 5 Deadliest Substances on Earth
There are natural poisons that lurk in bacteria, plants, and fungi pretty much everywhere, and they're there for good reasons (according to the organisms that produce them) - but what is it about their chemical make up that makes them so...
SciShow
Blue Whales and The Smartphone Morality Experiment
Hank shares news about the biggest animal in the history of ever -- blue whales -- and explains the lessons learned in a new study of human morality, using smartphones.
SciShow
Obesity
Hank tells us some of the surprising things that could be causing or contributing to the obesity epidemic.
TED-Ed
TED-ED: How menstruation works - Emma Bryce
At this moment, three hundred million women across the planet are experiencing the same thing: a period. The monthly menstrual cycle that gives rise to the period is a reality that most women on Earth will go through in their lives. But...
SciShow
What Happens When You Stop Eating?
You know what starvation is, but do you know what it does to you? Hank walks you through the three major metabolic phases of starvation, from burning sugars to, basically, self-cannibalism.