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flag A 3.4-million-year-old Ethiopian fossil confirms two early human species coexisted, with differing diets and tree-climbing habits.

flag A 3.4-million-year-old fossil foot from Ethiopia, confirmed to belong to Australopithecus deyiremeda, reveals that this ancient human relative coexisted with Lucy’s species, A. afarensis, and likely spent more time in trees due to its opposable big toe. flag New fossils, including a jaw with 12 teeth, show A. deyiremeda ate leaves, fruit, and nuts, while A. afarensis consumed more grasses, suggesting they occupied different ecological niches. flag The findings, based on CT scans and isotope analysis, indicate multiple hominin species lived together around 3 million years ago, challenging the idea of a simple, linear human evolutionary path and highlighting greater diversity in early human adaptations.

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