Get those arms up in today’s poses to loosen tight shoulders. You’ll even do Shoulderstand and Corpse with arms raised!

This video examines the various uses of light and the role of different types of lenses in light refraction. The way in which eyeglasses, contact lenses, and binoculars manipulate light to allow us to see better is illustrated. Other...

In this video, I demonstrate and explain the scalene stretch, which is useful in cases of upper cross syndrome, thoracic outlet syndrome, and many more.

Today’s poses loosen your shoulders, chest, and upper back, making great posture a breeze. You’ll also go on an abdominal strengthening bike ride—without a bike.

Wai Lana shows you different exercises to strengthen and build a healthy back—essential for an active lifestyle.

In this video, the speaker explores the anatomy of the knee joint and discusses the consequences of hyperextension, or going backwards, which can cause damage to the ligaments, tendons, and bones. He also explains the different grades of...

Individual fitness exercises - Tricep dips

Twist your torso to touch your toes and loosen your spine, hips, and legs at the same time. Then balance on your buttocks in Full Arrow.

Relativity comes in different flavors, as it happens. We spent some time looking at special relativity, so now it's time for the general variety. This is all about the geometry of spacetime, which curves around massive objects. This was...

In this video, we learn about the science behind apparent sunrise and delayed sunset. We explore the phenomenon of refraction of light and its effects on the direction and speed of light as it passes through different mediums. Through a...

The video is a lecture presentation on the concepts of stretching and bending. The presenter explains the different types of forces and their effects on an object's shape and size. They go on to discuss the deformation of an object and...

In this lesson, students will learn the meaning of the idiom "bend over backwards" through a comic strip. They will understand that idioms cannot be taken literally and will be able to interpret the true meaning of the phrase.

This tutorial focuses on the structure of the knee joint.

Know when and how to use the “Impulse Approximation”.

Conservation of energy explains how NASCAR's new car helped driver Michael McDowell walk away from a scary crash at Texas Motor Speedway in 2008.

This video is a lesson on bending stress and how it relates to the internal forces acting on beams. The video explains what bending stress is, the different types of normal stresses, and the concept of moments as a measure of rotation....

Check out our PE gymnastic station packs (for grades K-6) - A complete sport unit with over 60 activities for the trampoline, wedge, bars, floor mats, beams and more<br/>

Using real world demonstrations and colorful graphics, Real World Science: Light teaches students the different properties of light, pertinent definitions and how light travels. Students will learn how different mediums can affect light,...

We've learned about bones and the skeletal system, but bones are so hard, so why are our bodies so bendy and flexible? The answer is joints! Joints let our bodies move in all the way they do, and they are many different types, so let's...

An iconic skyscraper will be one of the tallest in the world when it’s completed in the next few months.



But it’s already making headlines not just for its height but also for it’s state-of-the-art...

Marcus Bracey is a third-generation neon light artist and owner of God's Own Junkyard, home to the largest collection of neon signs outside of the US.

A computer animation depicts cartilage in the human body.

leaf stem

HD1080i: Close up view of a tree branch with frosted leaves.