Today Hank talks with Dr. Cara Nelson about invasive plants that use toxic chemicals and rapid reproduction to outcompete native plants, and Jessi brings some adorable invasive birds. Dr. Nelson is a professor of Restoration Ecology at...

Hank describes some scientific advances in the field of mind reading.

Hank tells us about the awesomeness of the periodic table and the genius of the man who invented it.

About 10% of the world population is left-handed. But why does handedness exist and what determines which hand is dominant? Scientists have suggested several theories, but the answer may well lie with evolution.

Are you ready to learn something about the world? Then you're ready for Bertolt Brecht, and his ideas about Epic Theater. Brecht wanted to lean into the idea of theater as a tool to upset and educate the world about stuff like the...

Eighty percent of the world's biodiversity is within Indigenous territories, yet these communities often don't have a say when it comes to protecting the lands they inhabit. Environmental activist Jupta Itoewaki explains why Indigenous...

Want to learn more about the topic in this week's video? Here are some keywords/phrases to get your googling started: - Mass Extinction Event: a significant, global decrease in the diversity of life - "Big 5": The five biggest mass...

In this episode of Crash Course Psychology, we get to meet the brain. Hank talks us through the Central Nervous System, the ancestral structures of the brain, the limbic system, and new structures of the brain. Plus, what does...

Ever stop to ponder how your brain ponders its own complexities? How does it know to tell your limbs to stop moving and have a think? Fear not, because we have answers to many questions about those wrinkly sponges!

You have a lot of choices if you’re looking to learn a new language, from Spanish to coding, or even whistling! And there are some broad similarities and patterns in the ways our brains process these different forms of communication.

This video was made with the support of the Heising Simons Foundation.





This video is about the Ozma problem of distinguishing the chirality (ie left-handedness or...

An algorithm for solving continuous 2d equations using winding numbers.

Could it be that all the electrons in the universe are simply one, single electron moving back and forth through time?

An algorithm for numerically solving certain 2d equations. Even though we described how winding numbers can be used to solve 2d equations at a high level, it's worth pointing out that there are a few details missing for if you wanted to...

The cross product is a way to multiple to vectors in 3d. This video shows how to visualize what it means.

More than a billion people worldwide, mostly children, do not have a legal identity. In many countries, this means they can't get access to vital services like health care and education, says legal identity expert Kristen Wenz. She...

Quantum Field Theory is generally accepted as an accurate description of the subatomic universe. However until recently this theory had one giant hole in it. The particles it describes had no mass!

Some people try to attack things like evolution by natural selection and man-made climate change by saying "Oh, that's just a THEORY!" Yes, they are both theories. Stop saying it like it's a bad thing! It's time we learn the difference...

Today Hank talks with Dr. Cara Nelson about invasive plants that use toxic chemicals and rapid reproduction to outcompete native plants, and Jessi brings some adorable invasive birds. Dr. Nelson is a professor of Restoration Ecology at...

FOMO (the fear of missing out) is a fairly common phenomenon, especially in this digital age. It can cause you significant stress and anxiety, but luckily psychologists have come up with a few tricks to combat it.

FYI: We try to leave jargon out of our videos, but if you want to learn more about this topic, here are some handy keywords to get your googling started:



- isolated peoples: peoples living without significant contact...

The cross product is a way to multiple to vectors in 3d. This video shows how to visualize what it means.

The universe is a pretty grand place to live, but scientists have one issue with it, it's an anomaly that should be scientifically impossible.

About 10% of the world population is left-handed. But why does handedness exist and what determines which hand is dominant? Scientists have suggested several theories, but the answer may well lie with evolution.