Nasa: Sci Jinks: What Causes a Rainbow?

A color-based video explains how scientists identified the colors of the rainbow and why we see different colors at different times. It introduces the idea of supernumerary colors and the disc shape of a rainbow as well.

Amaze your class with a video segment on rainbows and why they are not what they necessarily appear to be. Individuals watch light and ice merge, which triggers a prism, thus forming a rainbow. They listen to a scientific...

In the arctic circle, some hotels offer aurora borealis wake-up calls so visitors don't miss the northern lights. A Veritasium video explains what causes the northern lights. It also presents many misconceptions people still believe...

Discover what a polar vortex is and how high and low pressure affects the weather.

Chronic constipation includes those people with fewer than five bowel movements per week. Understanding the causes of constipation helps determine appropriate treatments. Changes in diet, schedule, stress, and age alter the way our body...

Halitosis is a curse that has plagued humanity since ancient times. But what causes it, and why is it so universally terrifying? The following video and guide outlines the basics of bad breath - and what you can do when it strikes you....

Scientists estimate anywhere from two to thirty percent of the world's population suffers from insomnia at any given time. A short video details the causes of insomnia, what happens to sufferers, and offers some possible solutions.

Onions, garlic, and coffee can all have unfortunate effects on your breath, but what is the real cause of halitosis? Follow along with this video as it investigates how the bacteria that live in our mouths are responsible for these...

Chemical reactions are happening all around us every second of every day, but what exactly causes these changes to occur? Using easy-to-understand analogies, this video explains how the concepts of enthalpy and entropy determine the ways...

Find out about how planets have been classified historically, and what scientists use to study them.