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16:07, 10 November 2019 (UTC)

Please discuss

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After you added material to Dark matter, it was reverted, with an edit summary indicating that the material appears to duplicate material already included in the article (at Dark matter#Galaxy rotation curves). Once the revert occurred, you should not just reinsert the material; instead, you should discuss the matter at Talk:Dark matter. (See WP:BRD.) WikiDan61ChatMe!ReadMe!! 15:48, 12 November 2019 (UTC)Reply