Gryfin

Hello, Gryfin! Welcome to Wikipedia! Thank you for your contributions. You may benefit from following some of the links below, which will help you get the most out of Wikipedia. If you have any questions you can ask me on my talk page, or place {{helpme}} on your talk page and ask your question there. Please remember to sign your name on talk pages by clicking or by typing four tildes "~~~~"; this will automatically produce your name and the date. If you are already excited about Wikipedia, you might want to consider being "adopted" by a more experienced editor or joining a WikiProject to collaborate with others in creating and improving articles of your interest. Click here for a directory of all the WikiProjects. Finally, please do your best to always fill in the edit summary field when making edits to pages. Happy editing! DVdm (talk) 16:34, 5 March 2013 (UTC) Getting Started The five pillars of Wikipedia • Tutorial • Your first article How to: edit a page • upload an image Getting Help Frequently Asked Questions New contributors' help page Where to: ask questions • make requests Request administrator attention Policies and Guidelines Neutral point of view • Reliable sources Verifiability • Citing sources • No original research What Wikipedia is not • Biographies of living persons Simplified Manual of Style • Three-revert rule Copyrights • Policy for non-free content • Image use policy External links • Spam • Vandalism • Sock puppetry Deletion policy • Conflict of interest • Notability The Community Community Portal • Adopt-a-user program Assume good faith • Civility • Etiquette No personal attacks • Resolving disputes Build consensus • Village pump Signpost • IRC channels • Mailing lists Things to do Be bold in editing • Help develop an article Maintenance • Peer review • Requested articles Join a WikiProject • Translating articles Cleaning up: General • Spam • Vandalism Miscellaneous Categories • Disambiguity • Stubs User pages • Talk pages Useful templates • Tools • User scripts

Reliable sources

Hello, I'm DVdm. I noticed that you made a change to an article, Criticism of the theory of relativity, but you didn't provide a reliable source. It's been removed for now, but if you'd like to include a citation and re-add it, please do so! If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thank you. - DVdm (talk) 16:34, 5 March 2013 (UTC)

Note - Please also have a careful look at our policies regarding wp:secondary sources and wp:original research. The source you added doesn't qualify. Cheers - DVdm (talk) 16:36, 5 March 2013 (UTC)