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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 2:09pm Friday 2:09pm

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 12:46pm 7/21/15 12:46pm

3D Scans Show How Semen Controls Sexual Behavior in Female Flies

It definitely takes two when it comes to making baby flies. Scientists have known for years that fly semen can trigger ovulation and make females lay more eggs. But no one knew exactly what those proteins did to the female reproductive tract. A new study published in PNAS takes a deep look inside fruit flies to find… » 7/06/15 7:35pm 7/06/15 7:35pm

Here's How Men Make 200 Million Sperm Every Day

Human testes are masters of mass production, spitting out sperm at a rate of 200 million per day. But that doesn’t mean the process is fast–it takes 64 days to make a sperm. The organ keeps the count high with an assembly-line anatomy that scales up sperm development from a trickle to a flood. » 6/24/15 3:11pm 6/24/15 3:11pm

This Is How Penile Erection Actually Works

Your spam folder is probably full of the offers. (Mine certainly is.) But none of the emails promising to let you “please your partner” by making you a “giant for girls” with “strong erections” say a thing about how the penis gets erect in the first place. Here’s how it really works. » 5/29/15 4:00pm 5/29/15 4:00pm

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 7:30pm 5/28/15 7:30pm

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 4:56pm 5/05/15 4:56pm

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 12:05pm 4/30/15 12:05pm

Scientists Made This Entire Mouse Transparent Using Detergent

Last year, scientists did the wacky and cool thing of making a mouse brain transparent. Now they've gone and done it to an entire mouse by pumping detergent through its veins. The transparent mouse looks like gross rodent jello (yes, there is a photo), but it's also an incredible new way to study what intact organs… » 7/31/14 5:19pm 7/31/14 5:19pm