Ultraviolet Light
Ultraviolet light is a form of radiation which is not visible to the human eye. It's in an invisible part of the 'electromagnetic spectrum'. Radiated energy, or radiation, is given off by many objects: a light bulb, a crackling fire, and stars are some…
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Engineering
Liquid Crystal Communication
The Information Age rides on beams of carefully controlled light. Because lasers form the arteries of modern…
Geology
Types of Volcanoes
Geologists describe four types of volcanoes. Cinder cones, the simplest of volcanoes, grow as pieces of…
Biology
Fahrenheit 100 and Rising
When you are well, your body temperature varies only a little around 37o C. (98.6o F.), whether you're…
Biology
Your Senses Make Sense of Energy
Your different sense receptors are designed to gather different kinds of sensory information about the world…