Have you ever thought you felt your phone vibrate, only to pull it out of your pocket and find that you have no new notifications? If so, you've experienced 'phantom vibration syndrome.' But what causes these mystery sensations, and are...

A unique look at the legacy of economist John Maynard Keynes, who first introduced the concept of government intervention in the economy, and his countertenor Friedrich Hayek.

In the past, some experiments were run in scary and unethical ways. From using children to unknowing subjects, these five experiments left people affected for the rest of their lives.

Have you ever thought you felt your phone vibrate, only to pull it out of your pocket and find that you have no new notifications? If so, you've experienced 'phantom vibration syndrome.' But what causes these mystery sensations, and are...

At any moment, there is an electrical storm coursing through your body. Discover how chemical reactions create an electric current that drives our responses to everything from hot pans to a mother's caress.

We chose not to give a numerical value for how many characteristics of life there are, because we do not want to imply that what we are listing must be a specific order, or that it cannot be expanded upon or include exceptions....

That terrible pain the befalls us when enjoying an icy treat! How does that happen? Is there a cure? Let Hank explain.

In March 2020, the COVID-19 pandemic rocked economies worldwide. Millions of people lost their jobs, and many businesses struggled to survive or shut down. Governments responded with some of the largest economic relief packages in...

Hank and his cat Cameo help teach us about animal behavior and how we can discover why animals do the things they do.

Hundreds of thousands of people get a tingling sensation, called ASMR, from things like whispering or personal attention. Here's what science has to say about it.

Paul Andersen defines the major elements of feedback loops. The receptors and effectors both sense and respond to changes in their environment. The following examples are used to illustrate the importance of feedback loops in...

It is now time to meet the system that helps your crazy brain stay in touch with the outside world. We follow up last week's tour of the central nervous system with a look at your peripheral nervous system, its afferent and...

A Quick Question answer that explains the chemistry that makes minty things taste “cool” and spicy things taste “hot”.

In which Jacob and Adriene teach you about the evils of fiscal policy and stimulus. Well, maybe the policies aren't evil, but there is an evil lair involved. In this episode we learn how government use taxes and spending influence the...

The Greek philosopher Aristotle used sensory experiences and body parts to propose that humans have five senses. But almost as soon as he proposed them, people noticed things that didn’t fit the bill. And the debate has continued ever...

Why is it that humans react to stimuli with certain behaviors? Can behaviors change in response to consequences? Peggy Andover explains how the brain can associate unrelated stimuli and responses, proved by Ivan Pavlov's famous 1890...

There's not a lot of tried and true ways to get a rowdy classroom in control, with the exception of the Good Behavior Game. But there's one big caveat as to who it helps.

Howcast - Barking is a dog's way to communicate, but sometimes a dog can talk too much. Follow these tips from the Dog Whisperer to keep your pooch from barking incessantly.

Howcast - Learn how to socialize your puppy from dog trainer Robert Haussmann of Dogboy, Inc. in this dog training video from Howcast.

This illusion creates the impression of a rotating circle of purple dots with a green dot appearing to chase them. In the video, you could show the illusion and explain how it works by breaking down the science of color perception and...

In this video students explore how animals sense and respond to stimuli. Students will create models of animals sensing information, processing it, and responding. Live-action video footage of different animals help students create...

Everything our brain does, from controlling movement to conscious thought, is achieved by the firing of electrical signals called neurons. Biology - Being Human - Learning Points. Everything our brain does is achieved by electrical...

Discover the hormones that dictate whether a plant grows downwards with gravity, towards water and nutrients, or upwards towards light. Biology - Plants - Learning Points. Tropisms allow plants to seek out the best conditions for...

Any living system, such as a plant or animal, that can respond to stimuli, reproduce, grow, and can maintain a stable internal condition in a changing environment. A Twig Science Glossary Film. Key scientific terms defined in just 60...