In which Mike Rugnetta quests for knowledge of the Holy Grail of Mythology. Which is the actual, literal Holy Grail! The cup of Christ! Legends about the Holy Grail are often connected to the British legends of King Arthur, and this...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. The Sistine Chapel is one of the most iconic buildings on earth -- but there's a lot you probably don't know about...

Since the discovery of the Higgs boson, physicists have searched and searched for any hint of new particles. That search has been fruitless. Until, perhaps, now. Today on Space Time Journal Club we'll look at a paper that reports a...

Museums are vessels of memory, knowledge, inspiration and dreams. Anne Pasternak, director of the Brooklyn Museum, makes the case for cultural institutions to take a leading role in supporting the world's recovery from COVID-19 -- and...

When Julius Maada Bio first seized political power in Sierra Leone in 1996, he did so to improve the lives of its citizens. But he soon realized that for democracy to flourish, its foundation needs to be built on the will of the people....

The human brain is visibly split into a left and right side. This structure has inspired one of the most pervasive ideas about the brain: that the left side controls logic and the right side controls creativity. And yet, this is a myth,...

Only 10% of the world is left handed, so why are so many athletes lefties?

Between 1840 and 1914, an estimated 40 million people left Europe. This is one of the most significant migrations in human history. So, who was leaving Europe? And why? Crash Course is on Patreon! You can support us directly by signing...

In this video Paul Andersen explains how Le Chatelier's Principle can be used to predict the effect of disturbances to equilibrium. When a reversible reaction is at equilibrium disturbances (in concentration, temperature, pressure,...

Invasive species destroying ecosystems are a huge problem, but there’s hope that we can help mitigate the damage.

Leaving your stitches in too long can have some serious consequences.

You’re a bank robber trying to escape from jail. Can you solve the riddle to get past the fence to freedom? -- Your timing made you and your partner infamous bank robbers. Now, you need to use that timing to break out of jail. Your...

No astronauts were harmed in the making of this video.

We've got two perfectly good hands attached to two perfectly good arms, so why do most people prefer to use one over the other for common tasks?

In "THE 99," Naif Al-Mutawa's new generation of comic book heroes fight more than crime -- they smash stereotypes and battle extremism. Named after the 99 attributes of Allah, his characters reinforce positive messages of Islam and cross...

How can Africans find solutions to Africa's problems? Conservation biologist Kevin Njabo tells his personal story of how he nearly became part of the group of African scientists who seek an education abroad and never return -- and why...

Alexis Stempien, one of SciShow’s script editors, faces off against Hank as they try to answer science questions about some fantastical topics!

David Gallo shows jaw-dropping footage of amazing sea creatures, including a color-shifting cuttlefish, a perfectly camouflaged octopus, and a Times Square's worth of neon light displays from fish who live in the blackest depths of the...

Hidden beneath Greenland’s ice and powered by a nuclear reactor, Camp Century made for an interesting US military base. But life under the ice came with unique struggles; and although it wasn’t mainly constructed for science, the base...

We tend to think of physical blindness like a blindfold, but it’s much more complicated than that, and in some instances, people who have lost their vision can still "see" subconsciously.

What would you do if your hand seemed to develop a mind of its own, beyond your control?

There’s no question that comets have been regarded as some of the most beautiful things in the night sky for thousands of years. But why are their heads often green but never their tails?

Though people are most familiar with Plato's fictional Atlantis, many real underwater cities actually exist. Peter Campbell explains how sunken cities are studied by scientists to help us understand the lives of our ancestors, the...

It's easy to imagine saving money next week, but how about right now? Generally, we want to spend it. Economist Shlomo Benartzi says this is one of the biggest obstacles to saving enough for retirement, and asks: How do we turn this...