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Males from more promiscuous species also evolve larger penises, so larger pelvic bones appear necessary to attach larger muscles for penis control.

As a negative control, Dean and Dines also compared testis size to the size of one of the animal's ribs. If pelvic bone size were simply a reflection of overall skeletal size, there should be a corresponding correlation in the ribs - but there was not, strengthening the interpretation that whale pelvic bones are specifically targeted by selection related to mating system.

Promiscuous Whales Make Good Use of Their Pelvises. Hips don't lie: Whale pelvic bones are not vestigial but instead evolved to help the marine Estimated Reading Time: 8 mins Pelvis bone is vital to whale sex "Everyone's always assumed that if you gave whales and dolphins a few more million years of evolution, the pelvic Estimated Reading Time: 3 mins Sex and science. All the good stuff. This article is more than 4 years old. Fewer than 10of women enjoyed stimulation to their mons pubis - the

Over the course of their four-year project, the team created a new way of measuring and quantifying the complicated 3D structures of bones, using laser scanners to generate 3D images of the bones and developing novel computational methods to analyze bones that lack obvious landmarks. The process has significant potential for the recording and study of bones by museums, Dines said.

When doing their data collection, the team had to request loans from the Smithsonian and several other museums, which would ship out the bones themselves for study.

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However, if all specimens were recorded using Dean and Dines' system, digital copies could be sent anywhere in the world for free - without risking the loss or damage of the original specimen. The data that Dean and Dines collected are detailed enough to generate 3D printed versions of the bones, if desired.

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Not only do they give us a new way of analyzing bones and other specimens, they also allow us to make precise replicas of those specimens. The replicas can then, for example, be sent to colleagues abroad or placed on exhibit while the original specimen stays in the museum researcher's lab for further study," Dines said. Their collaborators in this effort included Peter Ralph and Andrew Smith of USC Dornsife; E. Otarola-Castillo of Harvard University and Iowa State University; and Jesse Alas of West Adams Preparatory High School.

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High school students are rarely listed as co-authors on peer-reviewed scientific journal articles, but Alas more than earned his place on the list, Dean said. Currently a student at UC Irvine, Alas crossed Dean's path by chance when, on a tour of USC with other local high schoolers, he spotted a bit of Python programming language that Dean had written on a white board for his undergraduate students.

Dean said, "when I asked where he learned it, it turned out he was self-taught. Dean hired Alas to navigate much of the complicated computation that encoded 3D data of the pelvic bone structure.

This research was funded by USC startup funds, the National Institutes of Health grant 1R01GMand the William Cheney, Jr. Memorial Fund for Mammalogy.

Pain during sex can be caused by a number of stressors. Try these expert-approved pelvic floor exercises to help with painful naox-cap.comted Reading Time: 6 mins The hip bone contain the dissimilarities between the two sexes in which female hip bone adapt the capacity of childbearing. According to Krogman, the degree of accuracy in sex determination through bones is as pelvis gives the 95accuracy alone. In pelvis, Sciatic Notch Index is considered as the best criteria for sex determination An anal orgasm can happen after sexual stimulation of the nerves in or around the anus. Find out what an anal orgasm feels like and how to have one, according to sex experts

Journal Evolution. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!

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The muscles of a male whale's penis attach directly to the pelvis, giving the mammal greater control of its reproductive organs. Dine, manager of the mammals collection at the Natural History Museum of Los Angeles County, co-authored the paper with Matthew Dean, an assistant professor at the USC Dornsife College of Letters, Arts and Sciences.

Their work appeared this week in the journal Evolution. RELATED Sheriff's deputy, suspect killed in South Carolina shootout. But it appears that's not the case," Dean said in a press release.

A number of studies have already shown that sexual competition promotes the evolution of larger and larger reproductive organs. But the work of Dines and his colleagues go one further by surmising that pelvises in marine mammals, like whales and dolphins, have grown in size, facilitating control of increasingly large testes and penises.

Dines and Dean confirmed their suspicions by first measuring the size of hundreds of pelvic bones from a variety of museum whale and dolphin fossil collections.

Female pelvis bones. Hip bones. There are two hip bones, one on the left side of the body and the other on the right. Together, they form the part of the pelvis called the pelvic naox-cap.comted Reading Time: 6 mins Adequate lubrication and sufficient foreplay are critical to preventing all sorts of pelvic pain as well as potential tearing or tissue damage. Sexual position is another common cause for Pelvic pain can affect both men and women, but its causes differ for each sex. In women, ovarian cysts, endometriosis, or uterine fibroids, as well as several other health conditions, may cause Estimated Reading Time: 7 mins

They also mined recorded data on whales' testes size relative to body size. When they compared the two datasets, they were able to show that the bigger the penis, the bigger the pelvic bone. RELATED Survey: British hangovers add up to about a year. The research is evidence that not only is the pelvis not useless, but vital if a male whale wants to maintain control of his growing appendage.

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