By 35, 000 years ago the Neanderthals, a sub-species of human whose own origins were in Africa, were mostly extinct.

到35,000年前，尼安德特人这一起源于非洲的人类亚种几乎已经绝迹。

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By 35,000 years ago the Neanderthals, a sub-species of human whose own origins were in Africa, were mostly extinct.

到35,000年前，尼安德特人这一起源于非洲的人类亚种几乎已经绝迹。

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By showing algae's essential role in the evolution of photosynthesis, it also explores the innumerable species of plants which all have their origins in this one-celled life form.

从展示有关藻类生物的在光学作用进化过程中的必要角色，本纪录片同时显示所有庞大植物品种皆是源自这个单细胞形式生物。

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Natural selection would have played some role in the development of any such general aversions, which may have their origins in distant species, somewhere far back down the line that leads to us.

NEWYORKER: It Ain��t Necessarily So