自大约1.5万年前人类生起第一堆火起，光污染问题就一直伴随着人类，科学技术只是令这一问题更加严重而已。
Light pollution is a problem that has been accompanying man ever since he started his first fire some 15, 000 years ago, and technology has only made it worse.
自大约1.5万年前人类生起第一堆火起，光污染问题就一直伴随着人类，科学技术只是令这一问题更加严重而已。
Light pollution is a problem that has been accompanying man ever since he started his first fire some 15,000 years ago, and technology has only made it worse.
考古挖掘显示现代智人和尼安德特人用同种方法控制火，并且这种控火方法几乎可以表明他们会烹饪，并且至少20万年前就这样了。
Digs show that both modern humans and Neanderthals controlled fire in a way that almost certainly means they could cook, and did so at least 200, 000 years ago.
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