Carl Zimmer on the duck's incredibly long, corkscrew-shaped, ballistic penis.

My tale is rich with deep scientific significance, resplendent with surprising insights into how evolution works, far beyond the banalities of “survival of the fittest,” off in a realm of life where sexual selection and sexual conflict work like a pair sculptors drunk on absinthe, transforming biology into forms unimaginable. But this story is also accompanied with video. High-definition, slow-motion duck sex video. And I would imagine that the sight of spiral-shaped penises inflating in less than a third of second might be considered in some quarters to be not exactly safe for work. It’s certainly not appropriate for ducklings.

[As Carl says, video links are possibly NSFW.] [more inside]
posted by chorltonmeateater on Dec 23, 2009 - 59 comments

Australian scientists have found the world's oldest penis. Published Monday in the online version of Nature, the discovery of the 400 million-year-old clasper in an ancient fish specimen shows that animals were gettin' it on earlier than previously thought. Says one study author, "We were surprised because it's so big. We were expecting something smaller." SFW
posted by Dilemma on Jul 16, 2009 - 34 comments

Sexual ornaments grow out of all proportion It seems that men will be men throughout the animal kindom, not just our little lonely corner of of it. Most body parts grow proportionally with the rest of the body as individuals of a species become larger, although scientists have long known that visual cues of reproductive prowess are a special case. But is this the case with everyone?
posted by pezdacanuck on May 23, 2006 - 41 comments

Micro-penis sufferers, rejoice!
posted by digaman on Dec 7, 2004 - 50 comments