User talk:2409:4060:2E17:84F4:0:0:C64B:FD05

November 2020
Hello, I'm DVdm. I noticed that you made a change to an article, Variable speed of light, but you didn't provide a source. I’ve removed it for now, but if you’d like to include a citation to a reliable source 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. Thanks. DVdm (talk) 08:48, 4 November 2020 (UTC)
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Please do not add or change content, as you did at Short film, without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. - DVdm (talk) 08:50, 4 November 2020 (UTC)