Here's a shocking statistic: 50 to 80 percent of people in the criminal justice system in the US have had a traumatic brain injury. In the general public, that number is less than five percent. Neuropsychologist Kim Gorgens shares her...

Hacking is tough, but stopping hackers can be even tougher.

This week on Crash Course Big History, Emily is talking about process of human evolution, and the knack for innovation that has allowed humans to become so dominant on the Earth. Human innovation, and the ability to build on those...

Diana Laufenberg shares three surprising things she has learned about teaching -- including a key insight about learning from mistakes.

It's a moldy world out there, especially in the kitchen. You have questions about food mold, right? Well Hank has your answers.

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The architecture of the social internet itself tells us not to be patient - to load more tweets, to hit refresh for new posts, and to click the top search results. But just because information is new, or algorithmically determined to be...

Pia Mancini and her colleagues want to upgrade democracy in Argentina and beyond. Through their open-source mobile platform they want to bring citizens inside the legislative process, and run candidates who will listen to what they say.

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,...

Contents:<br/>
0:0<br/>0 - The Bug
3:31 - How the best<br/> first guess is chosen
8:54 - Does this ruin the game?

What we know today about global greenhouse gas emissions is mostly self-reported by countries, and those numbers (sometimes tallied manually on paper!) are often inaccurate and prone to manipulation. If we really want to get serious...

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 need to change how we prescribe drugs, says physician Daniel Kraft: too often, medications are dosed incorrectly, cause toxic side effects or just don't work. In a talk and concept demo, Kraft shares his vision for a future of...

There are thousands of mental health apps out there claiming to do everything from easing insomnia to treating PTSD symptoms, but are those really effective?

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?

With the amount of fake and doctored photos and videos out there, how can we know what to trust? Most of us are used to thinking that "seeing is believing" but as technology makes it easier and easier to spread unreliable content online...

In a 1990's study, participants recalled getting lost in a shopping mall as children. Some shared these memories in vivid detail, but there was one problem: none of these people had actually gotten lost in a mall. They produced these...

We've found thousands of exoplanets over the years, but if we're going to find one that can sustain life, we need to take a look at the one planet we know that can, Earth.

How do we search for alien life if it's nothing like the life that we know? Christoph Adami shows how he uses his research into artificial life -- self-replicating computer programs -- to find a signature, a "biomarker," that is free of...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. Our fingerprints are what make us unique -- but they're also home to a world of information hidden in molecules...

Today we're going to talk about degrees of freedom - which are the number of independent pieces of information that make up our models. More degrees of freedom typically mean more concrete results. But something that is statistically...

Your town is holding a mayoral election and the stakes have never been higher. You suspect one of the candidates will begin pushing false information to swing the election. As the cybersecurity expert, your job is to inoculate the...

Squeaks and Mister Brown are learning about senses! Did you know that animals that have whiskers can use them to sense things? First Grade Next Generation Science Standards Crosscutting Concept: Structure and Function: The way an object...

Look to your left. Look to your right. Look at this video. Today, John Green is going to teach you how to read laterally, using multiple tabs in your browser to look stuff up and fact check as you read. Real-time fact-checking an help...

David McCandless turns complex data sets (like worldwide military spending, media buzz, Facebook status updates) into beautiful, simple diagrams that tease out unseen patterns and connections. Good design, he suggests, is the best way to...