To check for evidence of fire, they may look for charred bones and pieces of charcoal.
为寻找祖先们生火的证据，考古学家们就要找到烧焦的骨头还有木炭。
As importantly, biochar improves fertility in a wide variety of tropical soils. Beneficial micro-organisms seem to crowd into the pores of the small pieces of crushed charcoal.
同样重要的是，由于有益微生物似乎会聚集到小块木炭碎料的孔洞中，“生物碳”还可以改善各种热带土壤的肥力。
The researchers used radiocarbon dating on22 pieces of microscopic charcoal found among Neandertal tools in fire pits in Gorham Cave.
研究者们使用放射性碳方法为在山洞中发现的22片木炭确定年代。
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