claim: Dark matter is a type of matter.
evidence: Ramiro II -LRB- c. 900 -- 1 January 951 -RRB- , son of Ordono II , was a King of Leon from 931 until his death .. King. List of Leonese monarchs. Leon. Leon, Spain. Ordono II. Ordono II of Leon. King of Leon. Kingdom of Leon. Initially titular king only of a lesser part of the kingdom , he gained the crown of Leon -LRB- and with it , Galicia -RRB- after supplanting his brother Alfonso IV and cousin Alfonso Froilaz in 931 .. Leon. Leon, Spain. Alfonso IV. Alfonso IV of Leon. Galicia. Kingdom of Galicia. Alfonso Froilaz. Alfonso Froilaz. The scant Anales castellanos primeros are a primary source for his reign .. Anales castellanos primeros. Anales castellanos primeros