如果距今200万年的南方古猿源泉种确实是人属的真正祖先，它怎么可能繁衍出比尔·吉姆贝尔（威廉·吉姆贝尔？）鞋盒子中距今历史更长的化石人属？
If two-million-year-old A. sediba is indeed the true ancestor of Homo, how could it give rise to those even older fossils assigned to Homo in Bill Kimbel's shoe box?
源泉种的大脑像猩猩一样，为420立方厘米——对南方古猿来说，这不算什么稀罕。
Its size is a chimplike 420 cubic centimeters—not at all unusual for something called Australopithecus.
源泉种的大脑像猩猩一样，为420立方厘米——对南方古猿来说，这不算什么稀罕。
Its size is a chimplike 420 cubic centimeters—not at all unusual for something called Australopithecus.
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