penis

Members of species with shells they must hold onto for survival have larger sexual tubes than those with less precious private property.

After losing his genitals in a roadside bomb explosion, the soldier endured a 14-hour surgery to have a donated penis, scrotum, and partial abdominal wall attached.

In one winning paper, scientists describe an insect whose females have evolved a penis-like appendage that penetrates males’ “vaginas.”

Scientists encountered a marine worm strikingly reminiscent of a human phallus, along with other bizarre creatures, while exploring deep seas off of the Australian coast this summer.

A man who lost his penis due to cancer has received the organ from a deceased donor.

A phallus-less reptile goes through a developmental stage with external genitalia, suggesting a common origin for the organ among amniotes.

Surgeons expect an organ donor’s penis given to a man who lost his in a botched circumcision to become fully functional.

Check out the remarkable explosive eversion of the duck penis.

Circumcision and sexual activity are but two factors that can influence the bacterial communities that inhabit male genitalia.

In avian species, a gene induces programmed cell death during development in the area where a phallus would otherwise grow.

Diminished bacterial diversity and abundance may help explain why circumcision is associated with reduced HIV infection.

Female preference may have driven the evolution of human males’ relatively large genitalia.

Female golden moles are more likely to choose a mate with a longer reproductive organ.

A species of sea slug discards its penis after mating, then grows another the next day, a tactic that may have evolved to avoid passing on the sperm of competitors.