All original content, including text, code, page design, graphics, and sound, in The Encyclopedia of Science, which is part of The Worlds of David Darling website, is protected by copyright.
Unless explicitly stated otherwise on the relevant page, material appearing in The Encyclopedia of Science may be copied only for the purposes of reading it or keeping it for personal reference by a single individual. Any other reproduction or distribution of the material in The Encyclopedia of Science, including commercial use, is not permitted without written consent. Requests for such use should be e-mailed to the contact address above.
Where the copyright is not owned by this website this will be clearly stated within the page. Such material is included either with the explicit consent of the relevant copyright owner, under the terms of the GNU Free Documentation License, under the guidelines of "fair use", or because it is in the public domain.
No part of this website may be posted or in any way mirrored on the World Wide Web or any other part of the Internet without written permission.