Grav-universe
Joined 25 February 2009
Latest comment: 13 years ago by DVdm in topic Source needed
Welcome
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Source needed
editWelcome to Wikipedia. Everyone is welcome to contribute to the encyclopedia, but when you add or change content, as you did to the article Time dilation, please cite a reliable source for the content of your edit. This helps maintain our policy of verifiability. Take a look at Wikipedia:Citing sources for information about how to cite sources and the welcome page to learn more about contributing to this encyclopedia. Also, please have a look at our policy about original research. Thank you. - DVdm (talk) 17:20, 4 January 2011 (UTC)