Barnum Brown, mutevedzeri wemukuru weAmerican Museum of Natural History, akawana chikamu chekutanga cheTyrannosaurus rex kumabvazuva kweWyoming muna 1900. Brown akawana imwe skeleton yeTyrannosaurus rex muHell Creek Formation muMontana muna 1902, inosanganisira mapfupa anenge makumi matatu nemana. Kunyora panguva iyoyo Brown akati "Quarry No. 1 ine femur, pubes, humerus, ma vertebrae matatu uye mapfupa maviri asina kutsanangurwa eDhinosaur hombe yeCarnivorous isina kutsanangurwa naMarsh.... Handisati ndamboona chero chinhu chakafanana kubva kuCretaceous". Henry Fairfield Osborn, purezidhendi weAmerican Museum of Natural History, akatumidza wechipiri Tyrannosaurus rex muna 1905. Zita rechirudzi rakatorwa kubva kumashoko echiGiriki τύραννος (tyrannos, "tyrant") uye izwi reOssaurus rinoreva "tyrant") uye izwi reLatin Ossaurus rinoreva "mambo Ossaurus" rinoreva "mambo wedzinza".
mambo