Light always travels at a speed of 299,792,458 meters per second. But if you're in motion too, you're going to perceive it as traveling even faster -- which isn't possible! In this second installment of a three-part series on space-time,...

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...

If you’ve been to a sporting event with a large number of people, you’ve likely seen, or even been a part of, “the wave.” But did you know that there are little fishies who do a version of the wave not for fun, but for survival?

In this video Paul Andersen explains how free-body diagrams can be used to solve kinematics problems. The only two parts of a free-body diagram are the object and all external forces acting on the object. Numerous situations are...

In this video Paul Andersen explains how the vector sum of forces can be used to identify the net force on an object. The net force can be used to determine the overall acceleration of the object using Newton's Second Law.

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!

New ReviewTime for a casual geniuses roundtable #storyofeurope #documentary #history

New ReviewThis is how you know you made it in North Korea... #documentary #northkorea

New ReviewKim Jong Un's Olympic Dream for North Korea #northkorea #documentary

New ReviewTeotihuacán, Mexico, Owes Its Success to a VOLCANO

New ReviewMeet the Ancestors of the Current Dolphins #evolution

New ReviewWho Was Sultan Abdul Hamid II of the Ottoman Empire?

From the Financial Crash to Supermarkets #documentarychannel

The Dictator's Story: Francisco Franco's rise to power #documentary

What if Yellowstone SUPERVOLCANO erupted? #documentarychannel

Cooperation between Arabic and Hebraic cultures #documentary

Project Nazi: the Conquest of "Living Space" #documentary #germany

The Volcano That Caused a Cataclysmic Event in El Salvador #volcano #documentary

Top 3 Worst Plagues in Human History #documentary #pandemic

A video entitled "Angle Problems" which shows how to find missing measures in the case of intersecting lines.

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

Athens, around 400 BC #history #documentary #ancientgreece

Alexander the Great's mother was convinced of his divine descent #history #alexanderthegreat

1945: five US Torpedo Bombers take off from Florida... #bermuda #mystery #documentary