What are the implications of having your work published in a magazine which specifies in its writer's guidelines that it is "not copyrighted"?  My son is interested in sending a story to a magazine that publishes the work of minors, but I want to understand what the non-copyrighted status of the magazine would mean for his rights over his work.  The magazine acquires one-time rights to publish.Does publication in a non-copyrighted work put one's writing in the public domain?