User talk:106.206.174.68

August 2022
Hello, I'm DVdm. An edit that you recently made to Talk:Mass in special relativity 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. Thanks! DVdm (talk) 21:12, 7 August 2022 (UTC)