Paul Andersen shows you how to construct a cladogram from a group of organisms using shared characteristics. He also discusses the process of parsimony in cladogram construction. He then explains how modern cladograms are constructed...

Sometimes culture can seem invisible like when we're surrounded by signals that tell us we're with others who are like us, but if we live or travel somewhere where the traits that define social norms are not our traits, culture can...

Humans make a lot of noise! Transportation, industries, & how we work and play in natural spaces all have an impact on the sound we put out every day, and all this noise pollution is disrupting how animals use sound to communicate.

We’ve talked about benzene a bit already in this series, but did you know that benzene rings are present in all kinds of familiar substances? The styrofoam packaging that comes with new appliances, some pharmaceuticals, pesticides, and...

Can someone’s political identity actually affect their ability to process information? The answer lies in a cognitive phenomenon known as partisanship. While identifying with social groups is an essential and healthy part of life, it can...

Terrorists and extremists aren't all naturally violent sociopaths -- they're deliberately recruited and radicalized in a process that doesn't fit into a neat pattern. erin Marie Saltman discusses the push and pull factors that cause...

What's that smell? Smell's like Organic Chemistry! This week Hank talks about Aromatics and Cyclic Compounds and naming their substituents, resonance as well as common reactions & uses.

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In the United States today, juries decide less than 4% of criminal cases and less than 1% of civil cases filed in court. At the same time, jury systems in other countries are growing. So what happened in the US? And could the...

Why do people sometimes do bad things just because someone else told them to? And what does the term Groupthink mean? In today's episode of Crash Course Psychology, Hank talks about the ideas of Social Influence and how it can...

In 2007, researchers surveyed 180 teachers to understand if they held stereotypes about their students. The most commonly held opinion was that Asian students were significantly more industrious, intelligent, and gentle. This might seem...

Have you ever wondered where cured meats like salami or pepperoni get their bright red color? Of course its from organic chemistry! A chemical called nitric acid gives them that bright color, while also increasing their shelf. It's also...

So today Craig is going to talk about where our political opinions come from. Of course, most people’s politics are grounded in their ideologies, but there are also other external influences such as the government itself, interest...

Today we're going to start our two-part unit on data visualization. Up to this point we've discussed raw data - which are just numbers - but usually it's much more useful to represent this information with charts and graphs. There are...

Film has the power to change the way we think about ourselves and our culture. Documentarian and TED Fellow Sharmeen Obaid-Chinoy uses it to fight violence against women, turning her camera on the tradition of honor killings in Pakistan....

Credits (and Twitter handles):

Script Writer: David Goldenberg (@dgolden
berg)
Script Editor:
Alex Reich
Video Illustrator
: Qingyang Chen
Video Director: Kate Yo
shida (@KateYoshida)
Video...

When trying to come up with a new idea, we all have times when we get stuck. But according to research by behavioral and learning scientist Marily Oppezzo, getting up and going for a walk might be all it takes to get your creative juices...

Due to a revolution in our understanding of the tree of life, birds are dinosaurs, while dimetrodons are not.

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FYI: We try to leave jargon out...

Ketones and aldehydes are all around and inside us, from the strong smelling component of nail polish remover, acetone, to hormones in our bodies, to drug treatments for allergies, COVID-19, and even cancer! We’ve already learned a bit...

Standing up to discrimination and hate should be everyone's business, says community activist Wale Elegbede. In this vital talk, he shares how his community in La Crosse, Wisconsin came together to form an interfaith group in response to...

Did you know that bananas are berries, but strawberries aren't? A lot of thought goes into classifying fruits and vegetables, and it all has to do with anatomy.

Paul Andersen explains the current classification system that we use in Biology. He starts with a brief history of taxonomy. He explains how the goal of classification is to reflect evolutionary relationships. He then explains how...

What’s the difference between race and ethnicity? Today we’ll look at how definitions of races and ethnicities have changed over time and across places. We also discuss the terms minority and minority-majority and how races are defined...

The human body is full of mysteries, but we can start to solve those mysteries with help from science and the bodies of grandma whales.

Fabric brighteners can liven up your old, faded clothing. But they don’t actually clean your clothes, and they’re often banned in the military!