A Cornell-led study is challenging a decades-old explanation for how chromosomes exchange genetic material within the biological process that forms eggs and sperm in mammals.

Genes associated with male reproductive biology appear to be under relaxed selective constraint in a primate species with low sperm competition.

Taxidermied, locked behind plexiglass and spinning slowly on a wooden dais in the National Museum of Scotland in Edinburgh, UK, the world’s most famous ewe remains a public spectacle three decades ...