Experţii au descoperit un os fosilizat ce aparţine unui strămoş al omului, care mergea ortostatic în urmă cu aproximativ 3,2 milioane de ani. Metatarsianul găsit pune capăt unor decenii de discuţii despre momentul în care strămoşii au început să meargă drept, pe două picioare, informează Daily Mail. Acesta, care este unul din oasele ce leagă degetele de baza labei piciorului, are o formă uşor concavă, aşa cum au oamenii.
Osul aparţine unui Australopitecus afarensis, creatura cel mai bine cunoscută sub numele de ‘Lucy’, al cărei schelet a fost descoperit în Etiopia în 1974. Fosila arată că ‘Lucy’ de fapt putea merge drept pe distanţe lungi şi chiar putea să alerge. Şi adăugând faptul că Lucy avea şi mandibula dezvoltată încât să poată consuma mai multe tipuri de mâncare, acest lucru arată Australopitecus putea trăi atât în zone împădurite, dar şi în câmp deschis.
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