That, ladies and gentlemen, is a duck penis. Science blogger Ed Yong has a great article up today about these freaky, corkscrew behemoths and the equally freaky, labyrinthine duck vaginas. A researcher from Yale has been studying both, and thinks these rather baroque naughty bits evolved in competition with one another, as female ducks tried to evade rape (or, rather, impregnation by a rapist) and male ducks tried to get around those barriers.
The shape of the female duck's vagina is a physical barrier that prevents the male from launching forth his ballistic penis to its fullest extent. It won't stop a drake from ejaculating (and those in Brennan's trials always did), but it does limit how far the semen is deposited along the vaginal tract. Not all males are hit equally hard by these defences. Those that the female actually wants to mate with have an easier time. If she's into a male, she strikes a pose that signals her receptiveness, keeping her body level and lifting her tail feathers high. She repeatedly contracts the walls of her genital tract, relaxing them for long enough for favoured suitors to achieve full penetration.
Males who try to force themselves upon her receive no such help and have to cope with vigorous struggling. The female may not be able to resist such advances, but her convoluted vagina gives her ultimate control over where the sperm of her current partner ends up. The fact that only 3% of duck offspring are born of forced matings suggests that females are indeed winning this battle of the sexes.
On Monday, we reported that for the first time, a plant seed had germinated on the moon, an early experiment to test whether food could someday be grown on the moon to feed residents of a lunar base. The cotton sprout was inside a canister on China’s Chang’e 4 lander that touched down on the […]
Starting Sunday evening, Jan. 20, 2019, North and South America will have a chance at seeing 2019’s only total lunar eclipse, from start to finish. Our Earth, Moon and Sun line up on Sunday night for the only total lunar eclipse of of the year. Catch it if you can.
Adam Savage is back with an all-new show, and he’ll be tweeting live during tonight’s MythBusters Jr. on The Science Channel. The episode is named “Battery Blast,” so we’re expecting there will be explodey explosions, and they’re mentioning “straight as an arrow” so, pointy weapons.
Want a career in web design? It’s true that these days, most anyone can throw up a page or two. But for true workhorse web design, you’ll sometimes need to match the platform to the project. Enter the Complete Front-End Developer Bundle, an educational grand tour around the best tools for the web. For beginners, […]
Things move fast in the world of social media, and they don’t slow down for marketers looking to make an impact. Whether you’re grabbing eyeballs for a major company or a local business, you’ll need to adjust your strategy for every platform. Don’t have a strategy to begin with? That’s where the Social Media Marketing […]
It’s a rude awakening for that rookie vacationer abroad when they try to plug in their gear for the night. Veteran jet-setters know that outlet shapes can vary wildly from country to country, which necessitates that most boring must-have for any world-traveler: A sackful of clunky power adapters. Awkward problem, elegant solution: The Twist Plus […]