translation.en: And the earliest evidence for it crops up somewhere between 80 and 120,000 years ago in Africa, when you see obsidian and jasper and other things moving long distances in Ethiopia.
translation.zh: 早期证明贸易开始于 8万年到12万年以前的非洲某地， 你看到黑曜石和碧玉和其他东西 是通过埃塞俄比亚的长距离交换贸易而来的。