The world's most entertaining and useless self-help guide, from the brilliant mind behind the wildly popular webcomic xkcd and the #1 New York Times bestsellers What If? and Thing Explainer



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Scientists have revealed the results of the Parker Solar Probe’s first two flybys of the Sun, and LIGO has a new instrument called the quantum vacuum squeezer!

Learn how some animals have adapted to survive in some of the hottest and driest environments in the world, by covering themselves in mucus and calling it good.

How to See Without Glasses

On this Space Time Journal Club we look at how gravitational waves can be used to search for extra dimensions of space!

Here's something to think about the next time you clean your windshield.

Our favorite fast radio burst, FRB 121102, brings us one step closer to understanding its source, and astronomers have a new theoretical upper limit for star masses.

A beautiful solution to the Basel Problem (1+1/4+1/9+1/16+...) using Euclidian geometry. Unlike many more common proofs, this one makes it very clear why pi is involved in the answer.

We’ve detected seismic activity all around the solar system, from earthquakes to moonquakes, marsquakes to venusquakes. But the most dramatic quakes we know of actually happen on stars!

A beautiful solution to the Basel Problem (1+1/4+1/9+1/16+...) using Euclidian geometry. Unlike many more common proofs, this one makes it very clear why pi is involved in the answer.

As long as we've been around, YES. But the universe gets much more exciting, AND much BRIGHTER, as we start winding our clocks back to the early days of the universe. Near the beginning of the universe, when space was rapidly expanding,...

Crash Course Chemistry Consultant, Dr. Heiko Langner talks to Hank about lab safety, geochemical research, and cleaning up super fund sites. Afterward, Jessi Knudsen from Animal Wonders joins them with Zapper, the Alexandrian Parakeet....

A brown thrasher knows a thousand songs. A wood thrush can sing two pitches at once. A mockingbird can match the sounds around it - including car alarms. These are just a few of the 4,000 species of songbirds. How do these birds learn...

Everyone is watching the sky during a solar eclipse, but but if you look down, you'll catch another kind of light show.

If salty water is constantly spilling into the world’s oceans, does that mean they are getting saltier by the day?

"Where does it hurt?" It's a question that activist and educator Ruby Sales has traveled the US asking, looking deeply at the country's legacy of racism and searching for sources of healing. In this moving talk, she shares what she's...

Be blown away with this episode of SciShow News as Hank talks about using the power of one of earths most powerful energy sources: Volcanoes!

According to legend, three galactic terraformers shaped your planet into a paradise. When their work was done, they left the source of their power behind: three golden hexagons, hidden in dungeons full of traps and monsters. If one...

By the end of this talk, there will be 864 more hours of video on YouTube and 2.5 million more photos on Facebook and Instagram. So how do we sort through the deluge? At the TEDSalon in London, Markham Nolan shares the investigative...

As we venture into the world of ethics, there are a lot of different answers to the grounding problem for us to explore. One of the oldest and most popular is the divine command theory. But with age comes a long history of questions,...

This video focuses on general functions of biomolecules. The biomolecules: carbs, lipids, proteins, and nucleic acids, can all can have important functions in the body. However, this video is not giving human dietary guidelines and...

Dr. Harry Harlow's rhesus monkey experiments in the 1950s contributed a great deal to psychologists' understanding of attachment theory. Unfortunately, his later experiments also contributed a great deal to the need for ethics regulations.

Caitlin Hofmeister walks you through NASA's planned Asteroid Retrieval Mission, which aims to capture a space-rock and put it in lunar orbit for study -- all by 2025!

How many of today's headlines will matter in 100 years? 1000? Kirk Citron's "Long News" project collects stories that not only matter today, but will resonate for decades -- even centuries -- to come. At TED2010, he highlights recent...