User talk:175.100.20.249

August 2021
Hello, I'm DB1729. I wanted to let you know that one or more of your recent contributions&#32;to Wikipedia:Contents/Portals/Natural and physical sciences have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Teahouse. Thanks. DB1729 (talk) 13:14, 9 August 2021 (UTC)