以下为句子列表：
英文: In 2003, Mark Stoneking, a geneticist at the Max Planck Institute in Leipzig, Germany, estimated from DNA differences that the body louse evolved from the head louse about 107,000 years ago.
中文: 2003年，普朗克学院的基因学家斯通金估算体虱大概在十万七千年前于头虱分叉。
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