News tagged with genitalia
Female choice benefits mothers more than offspring
Oct 22, 2009 |
3.7 / 5 (3) |
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The great diversity of male sexual traits, ranging from peacock's elaborate train to formidable genitalia of male seed beetles, is the result of female choice. But why do females choose among males? In a new study published ...
Hidden genitalia in female water striders makes males 'sing'
Jun 11, 2009 |
3.8 / 5 (5) |
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In a study published in PLoS ONE June 10, Chang Seok Han and Piotr Jablonski at Seoul National University, Korea, report that by evolving a morphological shield to protect their genitalia from males' forceful copulatory attemp ...
Genital stimulation opens door for cryptic female choice in tsetse flies
May 14, 2009 |
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Manipulation of male and/or female genitalia results in a suite of changes in female reproductive behavior in tsetse flies, carriers of African sleeping sickness.
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How 'secondary' sex characters can drive the origin of species
Biology /
Aug 25, 2008 |
4.4 / 5 (5) |
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The ostentatious, sometimes bizarre qualities that improve a creature's chances of finding a mate may also drive the reproductive separation of populations and the evolution of new species, say two Indiana University Bloomington ...
Size matters... if you're a rodent
Biology /
Feb 28, 2007 |
3.6 / 5 (7) |
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Promiscuity is common among female rodents, leading to competition between the sperm of rival males over who fertilizes the eggs. It now seems that possessing a longer penis may give males an advantage in this competition, ...
How does one sex grow larger than the other?
Biology /
Jan 29, 2007 |
3.7 / 5 (11) |
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Why are males larger than females in some animal species (such as most mammals), females larger than males in others (such as most insects), and why are the sexes alike in yet other species (such as several ...
'War Between the Sexes:' The Co-evolution of Genitalia in Waterfowl
Biology /
May 01, 2007 |
4.1 / 5 (11) |
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A team of biologists at Yale University and the University of Sheffield discovered anatomical details about the female reproductive tract in waterfowl that indicate that male and female anatomy have co-evolved in a “sexual ...
Study questions 'cost of complexity' in evolution
Biology /
Mar 31, 2008 |
4.3 / 5 (6) |
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Higher organisms do not have a “cost of complexity” — or slowdown in the evolution of complex traits — according to a report by researchers at Yale and Washington University in Nature.
Researchers find an evolutionarily preserved signature in the primate brain
Jun 20, 2008 |
4.3 / 5 (3) |
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Researchers from Uppsala University, Karolinska Institute, and the University of Chicago, have determined that there are hundreds of biological differences between the sexes when it comes to gene expression in the cerebral ...
Researchers find an evolutionarily preserved signature in the primate brain
Jun 20, 2008 |
4.4 / 5 (5) |
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Researchers have determined that there are hundreds of biological differences between the sexes when it comes to gene expression in the cerebral cortex of humans and other primates. These findings, published June 20th in ...
Certain female fish have special mating preference
May 15, 2005 |
5 / 5 (1) |
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Ladies' choice A biologist at Washington University in St. Louis has shown that for some fish species, females prefer males with larger sexual organs, and actually choose them for mating. That does not exclude ...
Sex isn't just fun, it's healthy
Feb 27, 2009 |
4.3 / 5 (10) |
3
Want a simple way to increase your longevity? Try sex. It's one of the most fun things we humans can do.
'Sexting' no worse than spin-the-bottle: study
May 26, 2009 |
5 / 5 (9) |
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Youths exchanging nude photos of themselves over cellphones, known as "sexting," should not face child pornography charges, as some have in the United States, a humanities conference heard Tuesday.
List of search results for genitalia
