translation.en: So there's another interesting thing that comes from this realization that humans have a recent common origin in Africa, and that is that when those humans emerged around 100,000 years ago or so, they were not alone on the planet.
translation.zh: 另外一个有趣的观点 那就是人类的共同祖先来自非洲 他们出现在 距今10年以前 但他们不是唯一的人类种群