This video is about the famous 'Twins paradox' of special relativity, how time can appear to be faster for two different observers at the same time, and which twin really is older (or younger) - the one who stays on earth or the one who...

Time passes for all of us at the same rate of one second per second. But why does it sometimes feel like time is passing so fast, or so slowly? Especially during COVID? Let’s learn about how our brains keep track of and try to make sense...

This video is about what happens if you try to pass a portal (like in the video game Portal or Portal 2) through itself - do you get a paradox? Infinite recursion? Impossibility? Contradiction? The end of the world? Collapse of the...

Turns out humans aren't the only animals that can medicate themselves - many other animals have found ways to deal with illness by using natural remedies. Hank will tell you about some of the most interesting methods animals have found...

The Five Stages of Grief show up in media everywhere from The Simpsons to Robot Chicken, but scientists have long been working on better ways to think about grief.

This video is about the famous 'Twins paradox' of special relativity, how time can appear to be faster for two different observers at the same time, and which twin really is older (or younger) - the one who stays on earth or the one who...

This video is about two-photon (gamma-gamma) physics, and how photons can interact with each other - either mediated by a passing lepton, or gravitationally via lensing, or via vacuum fluctuation...

Researchers have noticed some trends in the relationship between academic performance and noise. Spoiler alert: it doesn’t sound good.

Learn about the strongest, slowest, and fastest science in 2015!

Turns out humans aren't the only animals that can medicate themselves - many other animals have found ways to deal with illness by using natural remedies. Hank will tell you about some of the most interesting methods animals have found...

This video is about the definition of a day, and how it applies (or not) on the sun. Solar day, sidereal day, universal coordinated time (UTC) day, etc. Length of a day.

Breathing clean air is every child's human right, says grassroots campaigner Rosamund Adoo-Kissi-Debrah, sharing the heartbreaking story of her seven-year-old daughter, Ella Roberta, whose asthma was triggered to a fatal point by air...

This video is about compressed air cans (aka gas dusters) and why they get cold when you spray them. They cool off because the refrigerant inside (1,1-difluoroethane) is under pressure and boils off when the...

The Five Stages of Grief show up in media everywhere from The Simpsons to Robot Chicken, but scientists have long been working on better ways to think about grief.

Male birds have the largest genital diversity of any class of animals because their sex chromosomes make it easy to pass male-helping mutations down the...

In this shorts video we will answer a standardized math test questions about a function: true or false. We will use the vertical line test to examine each of the four graphs. We will understand that the vertical line test is when you...

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Howcast - Learn how to work the outside of the foot from certified reflexologist Chantel C. Lucier in this foot reflexology techniques video from Howcast.

Howcast - Learn how to do passing the open guard techniques from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video, part two of two.