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Mark H
To find out why this beetle has a spiky penis, scientists shaved it with lasers - http://blogs.discovermagazine.com/notrock...
To find out why this beetle has a spiky penis, scientists shaved it with lasers
To find out why this beetle has a spiky penis, scientists shaved it with lasers
"The thing in the photo above, I’m sad to say, is a penis. It belongs to the male seed beetle. And just in case you’re holding out hope that appearances are deceiving, I can assure you they are not. Those spikes are hard and sharp, and they inflict heavy injuries upon the female beetles during sex. Why would such a hellish organ evolve?" - Mark H from Bookmarklet
"Hotzy and Arnqvist found that the spines puncture or erode the female’s genital tract, allowing sperm to seep into her bloodstream. The duo labelled the sperm of their males with a mildly radioactive chemical so they could track its whereabouts in the female. They found that around 40 percent of the sperm ends up outside the female’s reproductive tract, in other parts of her body. And the longer the penis spines, the greater the leakage. Why does that help? The sperm obviously aren’t going to be fertilising any eggs in the female’s bloodstream. But seminal fluid contains more than sperm – it’s also a cocktail of other behaviour-bending chemicals. Some make the female more receptive to mating; others seem to induce egg-laying. For the seed beetle, as with many other insects, ejaculation is an act of manipulation as well as fertilisation." - Mark H
Nature is scary, yo. - Jennifer Dittrich
Goodness. - Derrick
Damn...I worried the day would get worse #penisproblems - Just Mrs. V
As one does when trying to solve spiky penis mysteries. - Eivind
... at least you'd know when it was in - Johnny
Mind. Bending. Sperm. ... o.O .. #dayum - MoTO Moca Blend
Prezygotic isolating mechanisms! - Jenny H.
Also, traumatic insemination! Sorry, I am a biology nerd. - Jenny H.
you make it sound so pretty. - MoTO Moca Blend