Una ricerca congiunta delle università del Cile e di Chicago ha spostato il baricentro dei polli applicando delle code artificiali (tipo sturalavandino) per osservare se influiva sulla loro camminata, che infatti accentua il movimento del ginocchio rispetto a quello dell'anca. Questo per aiutare a capire come camminassero i tirannosauri tipo il T-Rex e il Velociraptor. In English: Business insider
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