id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-3550		Natural history - Wikipedia			.html	text/html	4212	517	50	From the ancient Greeks until the work of Carl Linnaeus and other 18th-century naturalists, a major concept of natural history was the scala naturae or Great Chain of Being, an arrangement of minerals, vegetables, more primitive forms of animals, and more complex life forms on a linear scale of supposedly increasing perfection, culminating in our species.[19] Three of the greatest English naturalists of the 19th century, Henry Walter Bates, Charles Darwin, and Alfred Russel Wallace—who all knew each other—each made natural history travels that took years, collected thousands of specimens, many of them new to science, and by their writings both advanced knowledge of "remote" parts of the world—the Amazon basin, the Galápagos Islands, and the Malay archipelago, among others—and in so doing helped to transform biology from a descriptive to a theory-based science.	./cache/en-wikipedia-org-3550.html	./txt/en-wikipedia-org-3550.txt