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Humans

Quack Gadgets

Have you ever heard of the Battle Creek vibratory chair, the psychograph, or the violet-ray generator ? The Minneapolis-based Museum of Questionable Medical Devices provides information about these and many other items in its large collection. Includes photos, brief histories, and links to related Web sites. Go to: http://www.mtn.org/quack/devices/devindx.htm

Earth

Past and Future Earth

Curious about what Earth’s continents and oceans might look like 50 million years from now? Geologist Christopher R. Scotese of the University of Texas at Arlington has created a Web site devoted to plate tectonics and Earth’s geography and climate, from the deep past to the distant future. The site features maps of Earth, animations, […]

Math

Dimensions of Math

A colorful, interactive poster serves as a portal to the realm of dimension, with destinations ranging from Flatland to hyperspace.