The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. We don’t know exactly what it is, but we do know that dark energy accelerates the expansion of space. We think this means the...

We live in an age of protest. On campuses, in public squares, on streets and social media, protestors around the world are challenging the status quo. But while protest is often necessary, is it sufficient? Eric Liu outlines three...

On January 1, 1863, Abraham Lincoln legally changed the status of over 3 million people from "slave" to "free." But his emancipation proclamation wasn't a law - it was an executive order. The framers of the American Constitution made...

The Hubble Space Telescope has been sending home images of the universe for more than thirty years, but none of its work would have been possible without the many servicing missions that kept it up to date.

Do We Expand With The Universe

Regular old glass like the kind that makes up a mason jar can shatter and explode if put in the oven. But we do have types of glass that you can bake your pie or brownies in and it's all thanks to some neat chemical tricks.

Pascal's triangle, which at first may just look like a neatly arranged stack of numbers, is actually a mathematical treasure trove. But what about it has so intrigued mathematicians the world over? Wajdi Mohamed Ratemi shows how Pascal's...

Bridges. Bridges don't deal well with temperature changes. In order to combat this, engineers have come up with some work arounds that allow bridges to flex as they expand or contract. In this episode of Crash Course Physics, Shini talks...

The universe is HUGE. But, there is only so much of the universe we can ACTUALLY see, and if we wanted to measure that FINITE space, how would we do it? A gigantic ruler? One really long car ride? Or maybe it's something even more...

New ReviewIn this video, we explore the four types of sentences and practice identifying them along with using the correct punctuation mark at the end—a crucial step in building strong writing skills for students of all ages. We cover declarative-...

Ten infrastructure mega-projects America needs President Donald Trump and congress to fund and build in the near future.

Voters will cast ballots Sunday in referendum that could hand sweeping new powers to the president, CBC's Nil Köksal reports

Howcast - Learn how to warm up your voice with an arpeggio from vocal coach Cari Cole in this final video of a four-part Howcast series.

Howcast - Learn about the Apostles of Jesus in this Howcast video with Reverend Dr. Timothy Coombs.

Howcast - Learn how to create a low roll bridesmaid hairstyle from stylist Joy La Rosa in this Howcast wedding hair tutorial.

Howcast - Learn how to teach your parrot to go through a ring from Parrot Wizard Michael Sazhin in this Howcast video.

Howcast - Learn how to edit live paint regions with Adobe Illustrator from expert Will "Focus" Dubois in this Howcast video.

Howcast - So you’ve set up a wireless network, but the signal won’t reach through the house. What’s the point of being wireless if you can’t wander very far?

Howcast -Learn how to use puffers and steam sticks from glassblower Ed Donovan in this Howcast video.

Zookeepers are hoping they hit it off.

"Two massive stars in Wolf-Rayet 140 swing past one another, their winds collide, material compresses, and carbon-rich dust forms," according to NASA. Time-lapsed James Webb Space Telescope imagery of the system has revealed that every...

The United States has said that China's military power is growing at a pretty unprecedented rate. The Pentagon's annual report has said that Beijing is making its most ambitious move yet: a massive expansion of its nuclear arsenal. This...

In this video, we use the properties of logarithms to expand expressions.

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...