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Did Nicolas Copernicus steal his notion that the earth orbited the sun from an Islamic astronomer who lived three centuries earlier? "The jury is still out," writes Dick Teresi, whose intriguing survey of the non-Western roots of modern science offers several worthy arguments that Copernicus in fact ripped off Nasir al-Din al-Tusi. Common belief is that Westerners have been the mainspring of most scientific and technical achievement, but in Lost Discoveries Teresi shows that other cultures had arrived at much of the same knowledge at earlier dates. The Babylonians were using the Pythagorean theorem at least 15 centuries before Pythagoras drew his first triangle, and in A.D. 200 a Chinese mathematician calculated an incredibly accurate value for pi. The Mayans and other Mesoamericans were outstanding sky watchers and stargazers. The greatest advances occurred in math and astronomy, though Teresi also devotes chapters to physics, geology, chemistry, technology, and even cosmology. Sometimes he is a bit overeager to ascribe great thoughts to long-dead people (he casually suggests that "many ancient cultures had inklings of quantum theory"), but on the whole his book is a reliable and fascinating guide to the unexplored field of multicultural science. --John J. Miller [via]