To figure out if an idea is as good as we think it is, we have to talk to our customers. We’ve said it over and over again. We have to ask them what they like, dislike, want, or need, and we want honest feedback about our product or...

After he ended up on a watch list by accident, Hasan Elahi was advised by his local FBI agents to let them know when he was traveling. He did that and more ... much more.

People ask Google everything under the sun. One of the most commonly searched questions in the world is “How Can I Fall Asleep?” Allow us at SciShow to explain.

People ask Google everything under the sun. One of the most commonly searched questions in the world is “Why Is the Sky Blue?” Allow us at SciShow to explain.

Today, one of the biggest paradoxes in the universe threatens to unravel modern science: the black hole information paradox. Every object in the universe is composed of particles with unique quantum properties and even if an object is...

Hank describes to us some news stories that illustrate how science is continually changing the things we think we "know" - from the status of various animals species, to the way our senses work and even where the Moon came from -...

It's time for the end. At least the end of our first series on Physics here at Crash Course. In this episode of Crash Course Physics, Shini sits down to talk about Astrophysics and Cosmology. By using what we've learned this year, we can...

People ask Google everything under the sun. One of the most commonly searched questions in the world is “How do I grow a beard?”? Let SciShow explain.

Written language, the hallmark of human civilization, didn't just suddenly appear one day. Thousands of years before the first fully developed writing systems, our ancestors scrawled geometric signs across the walls of the caves they...

Neutrinos are weird. But all the big unsolved problems in physics are somehow connected to one unsolved mystery: Why do neutrinos have mass?

How people assess their abilities doesn't often line up well with how they objectively perform. However, there does seem to be a good reason for this, as well as a way that people can get better.

Why do so many companies make bad decisions, even with access to unprecedented amounts of data? With stories from Nokia to Netflix to the oracles of ancient Greece, Tricia Wang demystifies big data and identifies its pitfalls, suggesting...

So today, Craig is finally going to start talking about politics. Now up until this point we've specifically been looking at government - that is answering the questions of who, what, and how in relation to policies. But politics is...

If we hope to one day leave Earth and explore the universe, our bodies are going to have to get a lot better at surviving the harsh conditions of space. Using synthetic biology, Lisa Nip hopes to harness special powers from microbes on...

So, how do engineers even figure out what problem needs to get fixed? And what's the difference between identifying a problem and just complaining about something. In this episode of Crash Course Kids, Sabrina talks about how we can all...

Infidelity is the ultimate betrayal. But does it have to be? Relationship therapist Esther Perel examines why people cheat, and unpacks why affairs are so traumatic: because they threaten our emotional security. In infidelity, she sees...

Squeaks has a doctor's appointment coming up and he's a little nervous, so Jessi asked her friend Dr. Arron Carroll to come over and talk about what happens when you visit the doctor!

Strange landscapes, scorching heat and (sometimes) mad crocodiles await scientists seeking clues to evolution's genius. Paleontologist Paul Sereno talks about his surprising encounters with prehistory -- and a new way to help students...

Artificial intelligence is all around us ... and the future will only bring more of it. How can we ensure the AI systems we build are responsible, safe and sustainable? Ethical AI expert Genevieve Bell shares six framing questions to...

Asking questions almost always leads to finding answers, but those answers will often pose even more questions. Here are five mysteries started and later solved by science.

There's a lot we can learn from Mongolian nomads about how to survive in the years to come, says environmental activist Khulan Batkhuyag. Taking us on a journey through the country's stunning rural landscape, she shows how Mongolian...

In this video Paul Andersen explains how you can get your students asking more and better scientific questions.

In this video Paul Andersen explains how scientific phenomenon and sensemaking can be used in the science classroom to...

When it comes to tackling climate change, the size of a country doesn't matter -- it's their ambition that counts, says First Minister of Scotland Nicola Sturgeon. In a rousing talk, she shares examples of small nations -- from Bhutan...

In which Craig Benzine introduces a brand new Crash Course about U.S. Government and Politics! This course will provide you with an overview of how the government of the United States is supposed to function, and we'll get into how it...