A fourth Denisovan individual

Here we retrieve DNA from a deciduous lower second molar (Denisova 2), discovered in a deep stratigraphic layer in Denisova Cave, and show that this tooth comes from a female Denisovan individual本研究从出土于丹尼索瓦洞深层地层的下颌第二乳磨牙（Denisova 2）中提取了脱氧核糖核酸（DNA），并证实该牙齿来自一名女性丹尼索瓦人个体。