New techniques to detect Y chromosome genes show frequent loss of the Y in tissues of older men. The increase with age is clear: 40% of 60-year-old men show loss of Y, but 57% of 90-year-olds.
In 2008, genetic research suggested that Ötzi’s maternal lineage was extinct. His mitochondrial DNA (mtDNA) carried a rare signature never observed in any living person, leading researchers to ...
Daphne O. Martschenko and Sam Trejo both want to make the world a better, fairer, more equitable place. But they disagree on ...
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