Wikipedia Public Domain
This is a copyright notice that might be used by some items on this site.
Easy explanation of this copyright
This object is licensed under the Wikipedia Public Domain copyright notice. According to Wikipedia:
For all practical purposes on Wikipedia, the public domain comprises copyright-free works: anyone can use them in any way and for any purpose. Proper attribution to the author or source of a work, even if it is in the public domain, is still required to avoid plagiarism.