Legionnaires' Disease
Legionnaires' disease, which is also known as Legionellosis, is a form of pneumonia. It is often called Legionnaires' disease because the first known outbreak occurred in the Bellevue Stratford Hotel that was hosting a convention of the Pennsylvania Department…
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Geology
Types of Volcanoes
Geologists describe four types of volcanoes. Cinder cones, the simplest of volcanoes, grow as pieces of…
Biology
Tobacco Mosaic Virus
We all know that AIDS, SARS and flu are all caused by viruses. Most people, however, don't realize that some…
Astronomy
Right Ascension & Declination
Right Ascension (abbreviated R.A.) and Declination (abbreviated Dec) are a system of coordinates used by…
Astronomy
Stopping In Thin Air
Imagine you're going very fast -- much faster than a race car. In fact, imagine you're going 100 or 200 times…