User talk:217.210.7.159

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Happy editing! Doug Weller talk 10:25, 18 March 2020 (UTC)

Dark matter
If you look at the history of the article you will see that our software tagged your source as a predatory journal, and for that reason I've reverted your edit. Sorry about that, it's hard to tell sometimes what seemingly good sources are in fact bad. Doug Weller talk 10:26, 18 March 2020 (UTC)