Nausea and vomiting are common side effects of severe pain, but why do our bodies do this!?

Today we’re going to talk about the link between population and food energy. As the world's population keeps growing, finding ways to provide enough food and water for everyone while supporting a sustainable environment can be tricky! ...

In our final episode of Crash Course Geography we're going to take a look towards the future, and to do that we'll need to revisit our fundamental geography tools: space, place, and human-environment interactions! We'll talk about the...

Mr. Andersen explains the difference between physical and chemical changes. A brief discussion of chemical reactions and equations is also included.

Our final unit of Crash Course Sociology is medical sociology. Today we’ll explain what it is and get an overview of the role of society in our notions of health and disease.

Parasitic worms date back thousands of years, causing diseases that limit human potential. But today, effective treatment against them requires just a few pills, taken once or twice a year. With 1.7 billion people at risk of infection,...

What keeps you up at night? Pondering deep questions? Excitement about a big trip? Stress about unfinished work? What if the very thing keeping you awake was stress about losing sleep? This seemingly unsolvable loop is at the heart of...

Hank discusses the challenges involved in manned space travel to Mars, and sends us a message from his 17-year-old self.

There are many different approaches to modern yoga— though most forms have three core elements: physical postures, breathing exercises, and spiritual contemplation.This blend of physical and mental exercise is widely believed to have a...

The victory of the underdog. The last minute penalty shot that wins the tournament. The training montage. Many people love to glorify victory on the field, cheer for teams, and play sports. But should we be obsessed with sports? Are...

How does our knowledge grow? It turns out there are some different ideas about that. Schemas, Four-Stage Theory of Cognitive Development, and Vygotsky's Theory of Scaffolding all play different roles but the basic idea is...

New Review“Types of Maps” explores different types of maps and how each type is used.

New ReviewThe wind and rain and flooding and destruction that happen during a hurricane are dangerous, and have obvious impacts on the health of people who live in hurricane-prone regions. But many of the health impacts of hurricanes and floods...

Tuberculosis had a big impact on George Orwell's life and on his novel "1984." Drawing parallels between Orwell's struggle with TB and the themes of isolation, surveillance, and control in the novel, it delves into how Orwell's personal...

Cryptocurrencies have been skyrocketing in recent years, but these digital assets have more to them than just rampant speculation. Blockchain -- the digital ledger technology that enables cryptos -- has actual real-world use....

Germans love to shake hands. Certainly a social or business meeting is cause for a round of firm handshaking. You’ll be expected to shake hands with everyone. The handshake is so important that even when someone leaves during a business...

The Japanese enjoy socializing as much as other people, but their behavior may seem formal and unfamiliar to someone from another culture. Learn key do's and don'ts to ensure that you behave appropriately in social and business...

Introduce virtualization technology, its applications in Linux, and the advantages it offers for system administrators.

Get essential tips on business etiquette in Brazil. Watch a business role-play illustrating typical greetings and introductions. Learn how to greet Brazilian businesspeople and what common gestures and interactions are acceptable and...

This video explains the fundamental concepts of hardware and software in the context of computers and smartphones. It highlights how hardware refers to the physical components of a device, while software instructs these components on...

Why and how do we orgasm? In this episode of Crash Course Sex Ed, we’ll break down “the Big O”—its physical aspects, gendered expectations, and misconceptions. Plus, a fun cameo from a penis-camera.

The trainers and team at Horses of Hope are using horse therapy to improve the health and happiness of children.

Do Brain Exercises Really Keep You Mentally Fit?

Howcast - Learn if there really are new zodiac dates that may change your horoscope sign from astrology expert Lawrence Greco in this Howcast video.