Hello, 이방인 얼라이언스 and Welcome to Wikipedia! Thank you for your contributions to this free encyclopedia. If you decide that you need help, check out Getting Help below, 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 using four tildes (~~~~) or by clicking if shown; this will automatically produce your username and the date. Also, please do your best to always fill in the edit summary field with your edits. Below are some useful links to facilitate your involvement. Happy editing! Magog the Ogre ( talk) 17:38, 2 October 2011 (UTC) reply Getting started A tutorial • Our five pillars • Getting mentored How to: Edit a page • Upload and use images • Create your first article Intuitive guide to Wikipedia • Article Creation Wizard Getting help Frequently asked questions • Tips Where to ask questions or make comments Request administrator attention Help desk: A Wiki Styled page to ask questions on Help directory: A comprehensive list-style help contents page Policies and guidelines Neutral point of view • No original research Verifiability • Reliable sources • Citing sources What Wikipedia is not • Biographies of living persons List of policies • Three-revert rule • Sock puppetry Copyrights • Policy for non-free content • Image use policy External links • Spam • Vandalism • List of guidelines Deletion policy • Conflict of interest • Notability The community Build consensus • Resolve disputes Assume good faith • Civility • Etiquette No personal attacks • No legal threats Community portal • Village pump Signpost • IRC channels • Mailing lists Writing articles Be bold in editing • Develop an article The perfect article • Simplified manual of style Stubs • Categories • Disambiguation Peer review • Featured content Miscellaneous User pages • Talk pages Awards a registered contributor can achieve and award Clean up: General • Spam • Vandalism Join a WikiProject • Translation Useful templates • Tools • User scripts

Please do not remove content or templates from pages on Wikipedia, as you did to Speed of light, without giving a valid reason for the removal in the edit summary. Your content removal does not appear constructive, and has been reverted. Referring to this and this. There is no consensus on the talk page to remove this properly sourced (and generally accepted) content. Please stop pushing your wp:POV without consensus on the talk page. - DVdm ( talk) 08:22, 3 October 2011 (UTC) reply

Please do not insert {{citation needed}} tags on easy-to-source statements. Your tagging is POV-pushing and borders on VANDAL|vandalism. Bearian ( talk) 18:55, 3 October 2011 (UTC) reply