Editor’s Note: This article previously appeared in a different format as part of The Atlantic’s Notes section, retired in 2021. A reader writes: I was a longtime subscriber and sometimes contributor ...

A textual analysis of research papers suggests that biologists are biased toward studying male genitalia, at least in part because of outdated assumptions about male dominance over females in the ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. Millipedes’ exoskeletons glow fluorescent shades of green ...

Human genitalia evolved through development which has been chronicled by a team of researchers from Harvard University. Male snakes and lizards each possess a pair of penises, which evolved from ...

For most animals, survival is all about being good at getting laid. That’s why sexual dimorphism exists: Males often look and act differently than females of their same species because it helps them ...

It's always my pleasure to inform readers about interesting and surprising discoveries about nonhuman animals (animals). Indeed, some of the topics about which I've written make for great cocktail ...

Female fish in the Bahamas have developed ways of showing males that "No means no." "Genital openings are much smaller in females that live with the threat of predators and are larger and more oval ...