translation.en: With many of the same signs appearing in such far-flung places, especially in that 30,000 to 40,000-year range, it's starting to seem increasingly likely that this invention actually traces back to a common point of origin in Africa.
translation.zh: 相同的符号出现于如此广泛的地域， 而且都出现在三万到四万年前， 所以图形的发明极有可能 追溯到非洲大陆上某一个共同的起源。