Biology textbooks are full of drawings of DNA, but none of those show what DNA actually looks like. Sure, they're good models for understanding how DNA works, but inside of real cells, it's a whole lot more interesting. Learn why we...

Soil doesn't seem like it's "alive", yet it functions like a living thing in lots of key ways.

Population ecology is the study of groups within a species that interact mostly with each other, and it examines how they live together in one geographic area to understand why these populations are different in one time and place than...

What makes you, you? Psychologists like to talk about our traits, or defined characteristics that make us who we are. But Brian Little is more interested in moments when we transcend those traits -- sometimes because our culture demands...

In this video Paul Andersen explains how waves interact with objects and with other waves. When a wave hits a fixed object it will be reflected and inverted. When a wave hits a free object it will be reflected without being inverted. ...

Paul Andersen explains how organs work together to form organ systems and how organ systems work together to form organisms. The kidney and bladder work together to filter blood in the excretory system. The circulatory and respiratory...

Originally discovered by accident, X-rays are now used about 100 million times a year in clinics around the world. How do these magic eyes work? Ge Wang details the history and mechanics of the X-ray machine and CT scanners.

We’ve seen and discussed the ways in which the rapid pace of technological change has affected the media literacy landscape, and it’s clear that change isn’t slowing down. How will those changes affect the future of media literacy? How...

Plants have their own interconnected networks that allow them to communicate with each other, sometimes over considerable distances!

Traditionally, geography is studied as two interconnected parts: physical geography and human geography. For the first half of this series, we will be focusing on physical geography, which is all about recognizing the characteristics of...

Everyone eats, right? But how does that food get the energy to power you? In this episode of Crash Course Kids, Sabrina talks about the way energy moves, or flows, through an ecosystem and how that movement forms Food Chains! This first...

Artificial intelligence is everywhere and it's already making a huge impact on our lives. It's autocompleting texts on our cellphones, telling us which videos to watch on YouTube, beating us at video games, recognizing us in photos,...

In this video Paul Andersen explains how the quantum mechanical model of the atom refined the shell model. Uncertainty of the position of the electron as well as spin forces chemists to create an improved model. In this model the...

We've already talked about how the Earth is divided into four spheres (The Hydrosphere, the Biosphere, the Geosphere, and the Atmosphere). But, how do these different sphere interact with each other? In this episode of Crash Course Kids,...

Visayan warty pigs are critically endangered, so the birth of these energetic piglets is especially important.

One important nonverbal cultural cue is physical proximity to others. For instance, how close do you stand to others? What is your comfort zone? Standing distances shrink and expand across cultures. Learn how people might mark their...

Many people hear about culture and immediately think about protocol—a list of do’s and don’ts by country. But understanding culture is so much more than learning about proper gestures and acceptable etiquette. One must consider people’s...

This video explains how to interact with Git, which is through Git CLI, Git Bash, and Git GUI.

In this video, we will cover MVC architecture.

Social Emotional Learning My Well Being Teamwork

This video explains how operating systems serve as the bridge between users and computers, translating commands into the language of ones and zeros. It highlights the importance of understanding your operating system - whether it's...

This video provides an overview of the basic components of a computer setup, including the computer case, monitor, keyboard, and mouse. It explains how these parts work together to facilitate processing, display, and interaction with the...

Howcast - Learn how to make the switch from crib to bed from sleep specialist Janet Kennedy, Ph.D. in this Howcast video.

Howcast - Learn about paranoid personality disorder from psychiatrist Ankur Saraiya in this Howcast video.