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Welcome! We are an encyclopedia project, and more. We are a different sort of Web 2.0 wiki: We aim at credibility and quality, not just quantity. Both the general public and credentialed experts are encouraged to get involved. We use our real names, not pseudonyms. We're both collegial and congenial. We have added [[:Category:CZ Live|over Template:Articles number articles]] (and many subpages), and over five million words. Announcement: Eduzendium encourages university instructors to assign CZ topics to students! Group Status: check it out; Citizens, add yourselves! Contribute to Citizendium! New authors and editors welcome! Accounts usually approved within a few hours. Start here. Learn about us For readers: About the Citizendium For authors: The Author Role For editors: The Editor Role For the press: Press The Monthly CZ News Report, The Citizen! (No. 2!) Initiatives Core Articles - tackle high priority topics Recruitment - help invite others to join Subpages - add other types of info to CZ Eduzendium - students write CZ articles for credit Support us We're a 501(c)(3) non-profit, and we need your support. If you shop at Amazon.com or Barnes & Noble, do so through our links! We'll get donations at no cost to you. (read more) - Search All Products. Link to us. Help increase our page rank by linking to us.	Some of our finest [ about ] Approved Articles Developed Articles (over 700) Draft of the Week [ about ] 1901 photograph of a stentor (announcer) at the Budapest Telefon Hirmondó. Telephone newspaper is a general term for the telephone-based news and entertainment services which were introduced beginning in the 1890s, and primarily located in large European cities. These systems were the first example of electronic broadcasting, and offered a wide variety of programming, however, only a relative few were ever established. Although these systems predated the invention of radio, they were supplanted by radio broadcasting stations beginning in the 1920s, primarily because radio signals were able to cover much wider areas with higher quality audio. [more...] New Draft of the Week [ about ] Cosmology is a branch of astronomy and of metaphysics committed to the study of the universe as a whole, of the contents, structure, and evolution of the universe from the beginning of time to the future. As a branch of two very old endeavours of humanity, the study of the sky and the origins of the world, it embraces numerous related inquiries concerned with the world we live in and, to the extent it could be imagined and observed, the universe. As a branch of metaphysics it attained some prominence when Christian von Wolffe published Discursus Praeliminaris de Philosophia in Genere (1728). Von Wolff placed cosmology in his classification scheme of the main areas of philosophy, distinguishing cosmology from ontology, theology and psychology, essentially making it a distinctive field of philosophy unto itself. As a philosphy, its nature has been disputed over time since von Wolff but it can be said that generally, it is thought to encompass humanity's experience in, and the nature of, the physical world. As a science, it encompasses the work of observational astronomy and theoretical physics as scholars in both fields attempt to describe and explain the physical universe. Cosmology, as a science, attempts to construct models of the physical universe from observational data which are then tested. Cosmology, as metaphysics, involves a priori investigations of a rational cosmology and the conceptual and categorical analyses of the speculative philosopher. [more...]