A short explanation of why Bayes' theorem is true, together with discussion on a common misconception in probability

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...

Join Jessi and friends as they learn about sound waves by making a string phone! Plus, learn how to make your own!

When living underground leaves them vulnerable to attack, burrowing owls have a trick up their sleeve—they’ve developed the ability to mimic rattlesnake sounds that scare off predators!

We've all experienced thunder, but what ARE all those claps, booms, and rumbles?

In this video Paul Andersen explains how beats are created through interference of waves with similar frequencies. The changes in amplitude are caused by destructive and constructive interference. The frequency of beats is equal to the...

When faced with a big challenge where potential failure seems to lurk at every corner, you’ve probably heard the advice, “Be more confident!” But where does confidence come from, and how can you get more of it? Here are three easy tips...

You are probably aware of the fact that elephants make trumpeting noises - but did you know that most of their communication is so low pitched that humans can’t even hear it?

Ah, hiccups. They are typically harmless, and yet also very annoying. But why do they happen in the first place?

In this video Paul Andersen details the characteristics of electromagnetic waves. Electromagnetic waves are transverse waves that can move through both mediums and vacuums. The electric and magnetic fields oscillate perpendicular to...

In this video Paul Andersen explains how diffraction can be affected by the size of the wavelength. When waves pass through an opening or move around an obstacle a shadow region is created. The size of the shadow zone will decrease as...

In this video Paul Andersen explains how waves will diffract (or bend) around an obstacle or while traveling through and opening. Diffraction will be maximized when the size of the opening or obstacle matches the wavelength.

You've heard about them, but do you how they work? Or why they suck? Hank explains the science behind performance enhancers, including steroids, blood doping, and that stuff supposedly made out of deer antlers. You'll never look at...

In this deceptively simple 3-minute talk, Dr. Laura Trice muses on the power of the magic words "thank you" -- to deepen a friendship, to repair a bond, to make sure another person knows what they mean to you. Try it.

In this captivating talk, journey into the surprisingly colorful nights of the Amazon Rainforest, as artistic entomologist Leo Lanna and designer Lvcas Fiat introduce us to the shapeshifting wonder of a creature they've fallen in love...

The sounds we hear every day really do have effects on our health. Not just our ears, but our hearts and even our brains.

In the world of chemistry, an "organic" compound is often described as anything with carbon in it, and "organic chemistry" is the study of carbon compounds, but there is actually no single definition of what "organic" means in chemistry,...

Join Jessi, Bill and Webb to learn all about the place we call home!

You've probably heard of acid rain: rain that's more acidic than normal because of pollution in the atmosphere. But, if rain can become more acidic, shouldn't it also be able to become more basic?

Isabella Baumfree was born into slavery in late 18th century New York. Fleeing bondage with her youngest daughter, she renamed herself Sojourner Truth and embarked on a legendary speaking tour. She became known as an electrifying orator...

You've had a lot of fun learning new stuff with us on SciShow Kids, but have you ever wondered how and why you remember all that awesome knowledge? Join Jessi and Squeaks to learn about how your brain helps you learn, and way more!

Your heart gets a lot of attention from poets, songwriters, and storytellers, but today Hank's gonna tell you how it really works. The heart's ventricles, atria, and valves create a pump that maintains both high and low pressure to...

It's spring where Jessi and Squeaks lives, and that means the air is filled with the sounds of birds singing! But have you ever wondered why birds sing and who they're signing to?

You’re having a dream, and for some reason that giant rabbit that’s about to eat you starts to sing like a bird. You wake up to find that birds are singing outside your window! Check out this SciShow Quick Question to find out why those...