A team led by scientists from Baylor College of Medicine, University of Copenhagen, and Centre Nacional d’Anàlisi Genòmica and Centre for Genomic Regulation report discovering fossils of ancient chromosomes in the remains of a woolly mammoth that died 52,000 years ago. The fossils preserve the structure of the ancient chromosomes down to the nanometer scale – billionths of a meter. The discovery is featured on the cover of Cell.
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