We've misplaced the building blocks of the cosmos -- and particle physicists like Claire Malone are on a mission to find them. Despite scientists hitting a "major snag" in uncovering what exactly makes up dark matter and dark energy, she...

What color is a mirror? How much does a video weigh? Michael Stevens, creator of the popular educational YouTube channel Vsauce, spends his day asking quirky questions like these. In this talk he shows how asking the right -- seemingly...

When two people join a dating website, they are matched according to shared interests and how they answer a number of personal questions. But how do sites calculate the likelihood of a successful relationship? Christian Rudder, one of...

After weeks of exploring the existence of nature of god, today Hank explores one of the biggest problems in theism, and possibly the biggest philosophical question humanity faces: why is there evil?

Why do people succeed? Is it because they're smart? Or are they just lucky? Neither. Analyst Richard St. John condenses years of interviews into an unmissable 3-minute slideshow on the real secrets of success.

Some kids learn by listening; others learn by doing. Geoff Mulgan gives a short introduction to the Studio School, a new kind of school in the UK where small teams of kids learn by working on projects that are, as Mulgan puts it, "for...

Could there be intelligent life on other planets? This question has piqued imagination and curiosity for decades. Explore the answer with the Drake Equation -- a mathematical formula that calculates the possibility of undiscovered life.

Hank and the gang return with SciShow Quiz Show, where Sci Show's resident geniuses compete to win prizes for our subscribers!

Join Jessi and Squeaks in their brand new fort as they answer letters from their friends in Ivydale, England!

SciShow Quiz Show is back, with familiar faces Hank Green and Lindsey Doe matching wits about ancient science, puppies, and all kinds of words that have “sex” in them!

Another Host vs Host edition of the SciShow Quiz Show!

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

What is it about snakes that intrigues us so much? Is it their deadly venom, their spongey mouths, or their international travel?

Would you negotiate with someone you knew to be evil, to save lives? Samantha Power tells a story of a complicated hero, Sergio Vieira de Mello. This UN diplomat walked a thin moral line, negotiating with the world's worst dictators to...

Search engines have become our most trusted sources of information and arbiters of truth. But can we ever get an unbiased search result? Swedish author and journalist Andreas ekstrom argues that such a thing is a philosophical...

Psychologists consider nostalgia a complex emotion and it may have both benefits and risks.

For many, COVID has been a devastating virus, but there are people who don't exhibit any symptoms at all. Why is that?

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?

It takes light a zippy 8 minutes to reach Earth from the surface of the Sun. But how long does it take that same light to travel from the Sun's core to its surface? Oddly enough, the answer is many thousands of years. Sten Odenwald...

There's no single formula for a great talk, but there is a secret ingredient that all the best ones have in common. TED curator Chris Anderson shares this secret -- along with four ways to make it work for you. Do you have what it takes...

John Hunter puts all the problems of the world on a 4'x5' plywood board -- and lets his 4th-graders solve them. At TED2011, he explains how his World Peace Game engages schoolkids, and why the complex lessons it teaches -- spontaneous,...

How much do you get paid? How does it compare to the people you work with? You should know, and so should they, says management researcher David Burkus. In this talk, Burkus questions our cultural assumptions around keeping salaries...

Astronomers might have finally discovered part of why Tabby's Star acts so strangely and we have some new ideas about what triggers a type Ia supernova.

Daniel Tammet has linguistic, numerical and visual synesthesia -- meaning that his perception of words, numbers and colors are woven together into a new way of perceiving and understanding the world. The author of "Born on a Blue Day,"...