Gestützt werden diese Interpretationen durch eine Studie

Gestützt werden diese Interpretationen durch eine Studie, in der diverse physiologische und genetische Besonderheiten des anatomisch modernen Menschen – im Vergleich mit anderen Primaten – analysiert wurden. So sei der Säuregehalt des Magens bei Fleischfressern deutlich höher als bei Pflanzenfressern – und beim Menschen sogar höher als bei vielen anderen Fleischfressern. Dies sei vermutlich dem Umstand geschuldet, dass die Magensäure potentiell krankmachende Bakterien auf Fleisch abtötet. Auch unterscheide sich die Einlagerung von Fettvorräten in die Körperzellen – auch hierbei ähnele der Mensch anderen Fleischfressern.[17] Den Forschern zufolge weitete sich der Fleischverzehr – beginnend vor rund 2 Millionen Jahren – allmählich aus und erreichte seinen Höhepunkt bei Homo erectus. Spätestens im Jungpaläolithikum sei eine Umkehr dieses Prozesses zu beobachten, der sich in der Mittelsteinzeit (das ist in Europa die Periode nach dem Ende der letzten großen Vereisung) verstärkte und in der Jungsteinzeit, mit Beginn des Ackerbaus, seinen Höhepunkt fand. Die Forscher vermuten aufgrund ihrer und früherer Befunde, dass der anatomisch moderne Mensch erst in stammesgeschichtlich jüngster Zeit – seit rund 85.000 Jahren[18] – zunehmend pflanzliche Kost für seine Ernährung genutzt hat; hierfür sprächen auch die Funde von Steingeräten, die zur Verarbeitung von Pflanzenmaterial tauglich waren.

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