Kenneth T. Carontologist ayaa markii ugu horreysay u adeegsaday cilmi-baaris cilmiyeed si uu u tilmaamo in muruqyada hor-u-dhaca ee Tyrannosaurus rex ay awood u leeyihiin inay si dhakhso ah u dhaqaaqaan iyagoo adeegsanaya muruqyada hor-u-dhaca ee gacmaha ama gacmaha. Sida laga soo xigtay cilmi-baaraha Steven M. Smith, waxaa loo isticmaali jiray in lagu tilmaamo in muruqyada hor-u-dhaca ee tirannosaurus rex ay si dhakhso ah u dhaqaaqi karaan iyagoo adeegsanaya muruqyada gacmaha ama gacmaha. Si kastaba ha noqotee, waxaa jira caddayn cilmiyeed oo aan la isku halleyn karin oo muujinaya in muruqyada hor-u-dhaca ay awood u leeyihiin inay si dhakhso ah u dhaqaaqaan iyagoo adeegsanaya muruqyada gacmaha. Sida laga soo xigtay cilmi-baaraha kale, tirannosaurus rex wuxuu si dhakhso ah u dhaqdhaqaaqi karaa iyadoo la adeegsanayo muruqyada gacmaha.
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