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.

The complete reflection of a light ray within a transparent material.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

Find out how Sir Isaac Newton devised his laws of motion and explained how the universe works.
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Physical processes - Force and motion - Actio
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Learning Points
Sir Isaac Newton...

In this video, we explore the following as it pertains to cranial nerve II, the optic nerve: Origin Anatomy Functions Pathway to the Brain

A mirage is when light does not travel in a straight line and it makes distant things seem to be higher, lower, wider, thinner or just distorted. Light changes path because of differences in air density, which is controlled by...

ICESat-2's instrument, ATLAS, is designed to measure heights on Earth. ATLAS has three main tasks: transmitting a pattern of six laser beams, collecting the laser photons that return to the satellite after reflecting off Earth, and...

How rainbows create their colors, in refraction.