Paul Andersen describes the important features of the skeletal system. He starts by comparing and contrasting endoskeletons and exoskeletons. He then explains how the human skeleton provides support, movement, storage, blood production...

You don’t have to be Batman to think bats are awesome! Learn some fun facts about these furry flying mammals.

Since your body is already pretty good at healing itself, does icing an injury actually help?

So, it turns out we have an easy time reading emotions in facial expressions, but emotions can straight up kill us! In this episode of Crash Course Psychology, Hank discusses stress, emotions, and their overall impact on our...

What makes a good horror story? Hideous monsters and fountains of blood might seem like a good place to start, but as horror author H.P. Lovecraft wrote, _The oldest and strongest kind of fear is fear of the unknown." Writers harness...

Journey into the vital world of the circulatory system with "The Heart Song"! Perfect for kids, this catchy tune will spark your imagination and teach you all about the wonders of how the heart keeps us alive and thriving.

This video is answering the question of how many blood vessels are in brain.

Following the tragic events in Orlando earlier this month, there were many reports of gay men being turned away when they went to donate blood. Why do non-celibate gay men have their blood donations rejected? Turns out, it's an outdated...

Austin has been asking me to do an episode on bedbugs for quite some time. I've been pushing it off, because I hate bugs. But they're back, and he asked me again, and you can only avoid the pain for so long.

We’re back again with another episode on climate change and human health. The effects of a warming planet on our wellbeing are multifaceted, and there’s a lot to address in these complex interactions. One of those things is an increase...

For some women, a simple shot during pregnancy and then right after labor can prevent a huge amount of suffering for both parents and future children. So what happens when there’s a shortage that prevents that shot from happening?

There have been lots of recommendations over the years to eat a low-sodium diet. We've talked about the evidence on this before. Well, get ready to taste salt again. Research points to the conclusion that low sodium diets don't do much...

"Female Viagra" and regular or "male" Viagra were both originally investigated as treatments for conditions other than sexual dysfunction. Viagra came out of studies on hypertension, and "female Viagra" for depression. But that's where...

In this video Bill Thisdell looks at Charles I's reputation, charged with being a murderer and tyrant at his trial and yet later hailed as a martyr. Which was it? Was Charles really a bad king? How far was Charles responsible for the...

Uganda is at a turning point in its fight against malaria. In Kampala’s Mulago hospital, a staggering percentage of admissions are due to malaria and it is the highest cause of death amongst patients. The parasite is becoming resistant...

Welcome back to Bizarre Beasts: Season Zero, where we are remastering episodes of Bizarre Beasts that were originally created for Vlogbrothers. This episode, Feather Stars! The ancient sea creature that has been on this planet for 500...

Dengue fever is a mosquito-borne infection, which affects some 50 million people annually. It is now endemic in more than 100 countries in Africa, South America, the Eastern Mediterranean, Southeast Asia, and the Western Pacific. This...

You're walking home, a little tipsy, guided only by the moonlight. Suddenly, you sense something watching you: an unnervingly large owl with a human face! This is La Lechuza, a malevolent witch-owl from Tejano and Mexican folklore.

This video guides the viewer to examine symbols within a play and their meanings.

Dr. Jackson discusses the effects of diesel particles that can pass through filters and enter the lungs. The impact is especially severe on young children.

After properly documenting evidence, it's time to collect it for further analysis. How is this done? There is very strict protocol for keeping all evidence separate, and properly recording precisely where it came from, so let's get some...

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