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人和猿大约是在300万年前分道扬镳的。我们无从跨越浩瀚的时间和空间去考察这一过程的许多细节,但毫无疑问,从地面上站起来并直立行走,是人、猿相揖别的关键性一步。
People and apes parted ways about 3 million years ago. We have not been able to examine many details of the process across vast expanses of time and space, but there is no doubt that getting up from the ground and walking upright is a crucial step for humans and apes.