Category: Genetics

Tracking the lead SNP from a new GWAS of lifetime sexlessness across 12,000 years of West Eurasian ancient genomes, the author finds the allele associated with sexlessness was more common in the deep past and has declined toward the present. A weighted regression on 500‑year bins (adjusted for latitude and coverage) shows a negative time trend (slope ≈ 0.0105 per kyr; standardized β ≈ 0.51). This suggests slow, long‑run selection against genetic liabilities that reduce partnering and reproduction. — It injects evolutionary genetics into debates about modern sexlessness and mating markets, indicating that recent behavioral shifts likely reflect social environments rather than a genetic rise in sexlessness‑prone variants.

Stomach contents of well‑dated predator remains can serve as unexpected, high‑quality sources of contemporaneous prey genomes and tissues. Sequencing such material yields snapshots of lost populations, expands sampling coverage where direct remains are rare, and provides a forensic, context‑anchored route to study extinction dynamics. — If institutionalized, this method would materially enlarge paleogenomic datasets and change how conservation scientists and historians reconstruct late‑Quaternary population collapses and human–environment interactions.