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Here's an Anatomical Structure We've Never Seen in the Penis Before

You already know that a penis has arteries to bring blood to its erectile tissues, and veins that take the blood away again when it returns to its normal flaccid state. You may not know that there’s another set of vessels tucked under its skin. We just got our first good look at them. » 7/21/15 1:48pm 7/21/15 1:48pm

It's True, Scar Tissue Can Bend Your Penis (NSFW)

It’s normal for a penis to curve a little when it’s erect, but Peyronie’s disease pushes that curve to alarming extremes. It doesn’t usually muck with a guy’s ability to get it up, but once the penis is erect, it can deviate 30° or more from its normal line of action. The curvature can be so severe it interferes with… » 6/22/15 2:30pm 6/22/15 2:30pm

What Do You Want to Know About Sexual Anatomy?

When I was in graduate school, I wondered what changes made erectile tissue in the penis shift from its soft and flexible state to its stiff and inextensible state. Then, with the help of some armadillos, I did the research and figured it out. Tell me what you wonder about, and I’ll see whether I can figure it out for… » 5/28/15 3:30pm 5/28/15 3:30pm

You're Looking at an Insect Penis Inside its Mate

One of the biggest challenges for scientists studying the anatomy and physiology of genitalia is the fact that much of the real functional action happens deep inside females. It’s hard to see what’s going on in there. That’s why I love studies that rise to the challenge of giving us a peek inside. » 5/15/15 6:30pm 5/15/15 6:30pm

This Tiny Doll is Anatomically Correct All The Way In

If you were a midwife or a doctor attending childbirths during the 17th century, you might have owned a tiny anatomically correct doll like this one. Carved from ivory by German, French or Italian craftsmen, these tiny anatomical manikins opened to reveal the normal arrangement of human organs, including the lungs,… » 5/05/15 6:40pm 5/05/15 6:40pm

This Bird's Freaky Mating Display Comes Out Of Nowhere

Most of the time, the male Superb Bird of Paradise is a fairly nondescript black bird. But when it tries to attract a mate, it flips its feathers around to create a fluorescent kabuki mask that you’ll never forget. In this video, ornithologist Ed Scholes explains how the bird creates the illusion.
» 4/30/15 1:30pm 4/30/15 1:30pm