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WGBH Educational Foundation
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From an outsider's perspective, storm chasing might appear to involve hours and hours of boredom, accentuated by a few moments of unimaginable excitement. But to tornado researchers, the effort and expense they expend...
The Grand Canyon: Its Youngest Rocks
This video segment adapted from NOVA shows a dramatic landscape created by relatively recent rock-forming activity in the Grand Canyon. Volcanic eruptions only a million years ago created the canyon's youngest rocks. In...
Infrared: More Than Your Eyes Can See
The electromagnetic spectrum, spanning energies and wavelengths from radio waves to gamma rays, encompasses all forms of light. Infrared radiation, located in the range just beyond visible light, is emitted by all...
Characteristics of the Sun
Our Sun is an ordinary star; however, as our own star, it holds special status for us and is essential to our existence. The Sun's gravity holds the solar system together, and nuclear fusion within the Sun supplies the...
Compare and Contrast Warm and Cold Fronts
In weather, fronts are defined as the boundaries between different air masses. Depending on the direction of movement and the characteristics of the air involved, different types of fronts form. This visualization shows...
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