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This World Health Organization website feature focuses on tropical diseases. For visitors unfamiliar with which diseases out there are considered tropical, this website provides informative fact sheets on fourteen...
This site describes soft gamma repeaters. The author, Robert C. Duncan of the University of Texas at Austin, explains how these strange, physically-extreme stars form, and why they emit steadily pulsating X-rays with...
This site contains a set of optical illusions. These illusions are designed to show the user the biases and perception tricks their minds play on them while looking at different pictures. The different resources are...
This web page, authored and curated by David P. Stern, provides a non-mathematical introduction to modern magnetometers that depend on the saturation of magnetic materials. Applications include the observation the very...
These web pages, authored and curated by David P. Stern, provide a short overview of the common (Gregorian) calendar and some less-common ones--Julian, Jewish (leap months), Moslem, Persian (New Year on the spring...
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