Recently, American scientists discovered that by using a tweaked shampoo recipe on old woolly mammoth hair, they could remove the extraneous bacteria from the strands and get clean DNA samples.
最近,美国科学家发现,通过在古老的长毛象毛发上使用一种改良的洗发水配方,可以去除毛发上的外来细菌,并获

的DNA样本。