Its shape indicates the diminutive, human-like species Australopithecus afarensis had arches in its feet.

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She belonged to a species called Australopithecus afarensis, which is believed to be ancestral to modern man.

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It is thought to have been left by a pair of Australopithecus afarensis, vainly retreating from an erupting volcano.

BBC: NEWS | Science/Nature | Robotics show Lucy walked upright

This contrasts sharply with the short legs and long arms of the Turkana boy's antecedent "Lucy" (Australopithecus afarensis), who lived in Ethiopia about one million years earlier.

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Over six months the team also built Nariokotome boy, a member of the species Homo erectus, and one of our earliest prehistoric ancestors - an Australopithecus afarensis named Lucy.

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