User talk:2402:3A80:160C:F012:E83D:C513:8CEE:FB2E

July 2021
Hello, I'm Zudo. An edit that you recently made to Mass–energy equivalence seemed to be a test and has been reverted. If you want to practice editing, please use the sandbox. If you think a mistake was made, or if you have any questions, you can leave me a message on my talk page.   Zudo (talk) 14:05, 8 July 2021 (UTC)

Please refrain from making unconstructive edits to Wikipedia, as you did with this edit to Mass–energy equivalence. Your edits appear to be vandalism and have been reverted or removed. If you would like to experiment, please use the sandbox. Repeated vandalism can result in the loss of editing privileges. Thank you. DVdm (talk) 14:32, 8 July 2021 (UTC)