5700年前生活在现今丹麦洛兰岛希尔索姆(Syltholm)附近的少女“罗拉”(Lola),有深色头发、深色皮肤和蓝色眼睛,有乳糖不耐症,可能也有牙周病—这些都是从一块新石器时代留下的桦树焦油中所含去氧核糖核酸(DNA)得知的线索。
哥本哈根大学全球研究所研究人员日前在“自然通讯”期刊发表报告,在希尔索姆挖掘出这块两公分长的焦油,有如“时光胶囊”般透露当时人类的生物特征、生活习惯等资讯。
旧石器时代人类已会使用桦树焦油当黏著剂,但可能也当作“口香糖”或牙刷。报告作者、分子人类学家施洛德(Hannes Schroeder)说,“这是首次从人类骨骸以外的物品,得出完整的远古人类基因”,令人大感意外。
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