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Why the Cervix Is More Amazing Than You Realized

Technically, the cervix is the bottom chunk of the uterus, a circular plug-like mass of tissue dividing the uterine space from the vagina. But where most of the uterine wall is made of smooth muscle, up to 90% of the cervix is built of stiff and unyielding connective tissue. At least, it’s stiff most of the time. » 8/14/15 8:30pm 8/14/15 8:30pm

How That Butt-to-Butt Stage of Dog Mating Happens

If you’ve ever watched a pair of dogs have sex, you’ve probably noticed something odd happen partway through the act. At first, the male grips the female’s back and humps away–nothing unusual about it. But then he dismounts and turns to face away from his mate, with his penis still stuck inside her. » 8/11/15 2:31pm 8/11/15 2:31pm

Women Really Don't Notice Details About Your Penis

We’ve seen it in study after study: men worry about what their penis looks like. Is it too short? Too long? Too thin? Is the glans too fat? Will that birthmark be a deal breaker? Relax. A study published in the Journal of Sexual Medicine last month suggests that women don’t really notice those details.
» 8/06/15 11:33am 8/06/15 11:33am

Here's How a 13-Foot Wide Egg Mass Fits Inside a 5-Foot Squid

On July 9th of this year, divers off the coast of Turkey ran across an enormous lump of gelatinous goo which turned out to be one of the largest squid egg masses ever found. That inspired science writer and squid expert Danna Staaf to make this video explaining how all that goo fit inside a much smaller mother squid. » 7/31/15 11:30am 7/31/15 11:30am

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