Studie kopplar T. rex korta armar till utvecklingen av en kraftfull skalle

20 maj 2026

Rapporterad av AI

Tyrannosaurus rex små armar utvecklades troligen i takt med att de gigantiska rovdinosaurierna började använda sina massiva skallar och käkar för jakt, enligt ny forskning. Forskare undersökte dussintals theropod-arter och fann ett starkt samband mellan krympande framben och robusta skallar. Studien tyder på att denna förändring skedde när rovdjuren började inrikta sig på enorma byten.

Forskare från University College London och University of Cambridge analyserade 82 theropod-arter. De fastställde att reducerade framben utvecklades oberoende i minst fem släktlinjer, inklusive tyrannosaurider. Kopplingen mellan korta armar och starka skallar visade sig vara starkare än något samband med den generella kroppsstorleken.

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