How can Africa, the home to some of the largest bodies of water in the world, be said to have a water crisis? It doesn't, says Olufemi Taiwo -- it has a knowledge crisis. Taiwo suggests that lack of knowledge on important topics like...

The religion of Islam significantly influenced knowledge-making in the greater Mediterranean and western Asian world. Islamicate scholars—meaning people influenced by Islamic civilization, regardless of their religious views—gave us...

Josette Sheeran, the head of the UN's World Food Program, talks about why, in a world with enough food for everyone, people still go hungry, still die of starvation, still use food as a weapon of war. Her vision: "Food is one issue that...

Is it possible to run a company and reinvent it at the same time? For business strategist Knut Haanaes, the ability to innovate after becoming successful is the mark of a great organization. He shares insights on how to strike a balance...

Wingsuit jumping is the leading edge of extreme sports -- an exhilarating feat of almost unbelievable daring, where skydivers soar through canyons at over 100MPH. Ueli Gegenschatz talks about how (and why) he does it, and shows...

What does it look like inside the mind of a machine? Inspired by the architectural vision of a futuristic Los Angeles in "Blade Runner," media artist Refik Anadol melds art with artificial intelligence in his studio's collaborations with...

Sunken relics, ghostly shipwrecks, and lost cities aren't just wonders found in fictional adventures. Beneath the ocean's surface, there are ruins where people once roamed and shipwrecks loaded with artifacts from another time. Peter...

Gregory Heyworth is a textual scientist; he and his lab work on new ways to read ancient manuscripts and maps using spectral imaging technology. In this fascinating talk, watch as Heyworth shines a light on lost history, deciphering...

Imagine a neuroscientist who has only ever seen black and white things, but she is an expert in color vision and knows everything about its physics and biology. If, one day, she sees color, does she learn anything new? Is there anything...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Everyone has an opinion about how to legislate sex work (whether to legalize it, ban it or even tax it) ... but...

In which John Green continues to teach you about Mary Shelley's Frankenstein. You'll learn about romantic vs Romantic, the latter of which is a literary movement. John will also look at a few different critical readings of Frankenstein,...

Forget home economics and standardized tests, education visionary Trish Millines Dziko has a much more engaging and fulfilling way for students to develop real-world skills. Get schooled by Dziko as she shares how project-based learning...

Dolphins are one of the smartest animal species on Earth. In fact, their encephalization quotient (their brain size compared to the average for their body size) is second only to humans. But exactly how smart are they? Lori Marino...

Hank describes to us some news stories that illustrate how science is continually changing the things we think we "know" - from the status of various animals species, to the way our senses work and even where the Moon came from -...

Photographer Phil Borges shows rarely seen images of people from the mountains of Dharamsala, India, and the jungles of the Ecuadorean Amazon. In documenting these endangered cultures, he intends to help preserve them.

The early 1900s was an amazing time for Western science, as Albert Einstein was developing his theories of relativity and psychology was born, as Sigmund Freud and psychoanalysis took over the scientific mainstream. Karl Popper observed...

Juana Ramírez de Asbaje sat before a panel of prestigious theologians, jurists, and mathematicians. They had been invited to test Juana's knowledge with the most difficult questions they could muster. But she successfully answered every...

UPDATE: We got a couple of things wrong when it comes to gravity (particularly that it has nothing to do with photons). Science is working tirelessly night and day to disprove its own theories about how the universe works (or at least,...

Air pollution knows no borders -- even in your own body, says public health expert María Neira. In this startling talk, she describes how the microscopic particles and chemicals you breathe affect all your major organs (including your...

We are generally pretty confident when it comes to things that we know really well. But what if your brain is lying to you... tricking you into thinking you know everything, but you really know nothing?

How does knowledge grow? Sometimes it begins with one insight and grows into many branches; other times it grows as a complex and interconnected network. Infographics expert Manuel Lima explores the thousand-year history of mapping data...

We all know that birds are incredibly smart, but some birds in Australia take things to the next level — they can intentionally start fires!

In Agbogbloshie, a community in Accra, Ghana, people descend on a scrapyard to mine electronic waste for recyclable materials. Without formal training, these urban miners often teach themselves the workings of electronics by taking them...

In which Craig Benzine introduces a brand new Crash Course about U.S. Government and Politics! This course will provide you with an overview of how the government of the United States is supposed to function, and we'll get into how it...