那时，人类祖先的第一个头盖骨在非洲出土：生在约300万至200万年前的小孩汤恩，现在公认为是一名南方古猿非洲种成员。

That's when the first skull of a human ancestor was unearthed in Africa: the Taung child, now recognized as a member of Australopithecus africanus, which lived about 3 million to 2 million years ago.

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斯特雷特认为，虽然南方古猿非洲种吃多种多样相差很大的食物，但在成熟的水果和它所偏好的其它动植物短缺的旱季就可能依赖坚果。

Strait thinks that A. africanus ate a wide variety of foods but could rely on nuts in dry seasons when the ripe fruit and other plants and animals it preferred were scarce.

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