The equator is a clear and accurate line around Earth that makes measuring latitude a precise science, but when it came to figuring out how to do that with longitude, British sailors were at a loss. Until they devised a competition....

If you think punching an asteroid to knock it off the course to Earth’s destruction is purely for science fiction, you might only be right a for a little longer! Plus, scientists are being thrown for a loop with the orbits of planets...

What does the future of business look like? In an informative talk, Philip Evans gives a quick primer on two long-standing theories in strategy -- and explains why he thinks they are essentially invalid.

In the 13th century, Genghis Khan embarked on a mission to take over Eurasia, swiftly conquering countries and drawing them into his empire. But, legend has it that there was one obstacle that even he couldn't overcome: a towering wall...

Hank takes you through the weird, twisted forests of Russia and Eastern Europe, where trees grow at odd angles. What caused trees to grow into big wooden pretzels? Was it wind? Manipulation by woodworkers? Nazis, maybe? See for yourself...

Continuing in our journey of understanding motion, direction, and velocity... today, Shini introduces the ideas of Vectors and Scalars so we can better understand how to figure out motion in 2 Dimensions. But what does that have to do...

The useful glare-blocking properties of polarized sunglasses are well-known to just about anyone who goes outside. What isn't so well-known is how they reduce glare in the first place. That answer is deceptively complicated!

The equator is a clear and accurate line around Earth that makes measuring latitude a precise science, but when it came to figuring out how to do that with longitude, British sailors were at a loss. Until they devised a competition.

In this video Paul Andersen explains how the work is a product of the external force applied to an object or system and the distance it moves. Power is a measure of the amount of work done per unit time. The work can be calculated as the...

Struggling with sketching graphs on the AP® Physics exams? In this video, Mr. P from Flipping Physics shares essential graphing tips learned as an AP Physics Reader, including why rulers matter, how to avoid common sketching mistakes,...

This video, entitled "Two-Dimensional Figures," explains how to transform two-dimensional figures.

This video, entitled "Translating Parallel Lines," demonstrates how a set of parallel lines can be translated on a coordinate plane.

Howcast - Let belly dancer Irina Akulenko teach you how to do the belly dance move known as a reverse horizontal figure 8 in this Howcast video.

Howcast - Learn how to predict numbers from professional illusionist Ben Nemzer in this Howcast magic tricks video.

Howcast - Learn about taking vertical vs. horizontal pictures from commercial photographer Dan Bracaglia in this digital photography lesson from Howcast.

Howcast - Learn how to attack with your elbows in this self-defense video from Howcast.

Howcast - Learn how to do a hula hoop behind the back pass from hula hooping expert Natalie "McFancy" Wise in this Howcast video.

Howcast - Learn how to scale objects with Adobe Illustrator from expert Will "Focus" Dubois in this Howcast video.

Howcast - Learn three simple tips that will make your pictures better from professional photographer Joe Sinnott in this Howcast portrait photography tutorial.

Howcast - Learn how to read a person just by looking at their hand using the ancient art of palmistry.

Howcast - This one's not as kinky as it sounds—it's actually used to harness a man to a load that needs pulling.

Design your own clothes by making sewing patterns, but pay attention to the details.

If you love roses, go vertical and plant a climbing rose.

Pupil outcome: I can explain how the value of a number relates to its position from zero. Key learning points: - Negative numbers are below zero on a vertical scale - Negative numbers are to the left of zero on a horizontal scale