mating

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What Loud Males May Be Saying About Their Balls

Primatologist lays it all out in 'calls-and-balls' paper

(Newser) - You know what they say: the louder the calls, the smaller the balls. OK, so maybe they don't say that, but they could start following research published Thursday in Current Biology . The Salt Lake Tribune reports researchers discovered the smaller a howler monkey's testicles, the deeper and louder... More »

Jaguar Gets Sent Home for Being 'Too Fat' to Mate

Salman has zero interest in lady friend at Delhi Zoo—but lots of interest in food

(Newser) - A jaguar is being sent home to Kerala, India, from a New Delhi breeding program after being accused of having a dad bod without the "dad" part. Salman had been borrowed by the Delhi Zoo to mate with Kalpana, its female jaguar, but there were problems: Salman turned out... More »

This Spider Can Eavesdrop on Its Sexual Rivals

Not only is courtship a learned behavior, but spiders pick it up quickly

(Newser) - It doesn't take much observational power to note that spiders have tiny brains. Really tiny. So the recent finding out of the University of Cincinnati —that they learn how to court mates by eavesdropping on the competition—is all the more impressive. "It’s a complex set... More »

This Animal Mates to the Point of Death

It's actually a real threat to the species

(Newser) - The good news: Scientists have discovered two new species of dusky antechinus to add to the three others found in the last few years for a 50% boost in diversity among the Australian mammals. The bad news: Three of the new species are already threatened by climate change, feral animals,... More »

Porpoise May Have Died From Too Much Mating

Old male likely died of starvation after devoting most of his energy to sex

(Newser) - A 5-foot-long, 110-pound elderly male porpoise—which likely washed up on Worthing beach south of London before being dumped more than a mile inland—appears to have devoted so much of its energy to mating that it ultimately died of starvation and hypothermia. "The male porpoise was in a... More »

Male Hummingbirds Stab Each Other in the Throat for the Ladies

Scientists say males use their long, sharp beaks as weapons in mating ritual

(Newser) - Bigger is better if you're a male hummingbird. Scientists have discovered that males grow longer, sharper beaks than females as they age—which they then use to stab each other in the throat during an elaborate mating ritual, according to research carried out by University of Connecticut scientists. The... More »

Thigh Bone Reveals Timing of Human-Neanderthal Sex

We were probably getting it on between 50K and 60K years ago

(Newser) - It's no surprise that modern humans and Neanderthals used to get it on —most people of Eurasian descent are, genetically, 1.6% to 2.1% Neanderthal. The question has long been when they did, with a wide estimate putting it between 37,000 and 86,000 years ago... More »

Study: Sex Is 385M Years Old

First time was awkward, 'done sideways, square-dance style'

(Newser) - Let's face it: Spawning in the water isn't terribly efficient or much fun at all. An extinct vertebrate named "Microbrachius dicki" sorted this out when it apparently became the first to master internal fertilization some 385 million years ago—far earlier than previously thought, reports Phys.org... More »

Macho Men Have So-So Sperm

Tradeoff between looks and virility might be at play, says study

(Newser) - Macho guys may attract more women, but the quality of their sperm might not be of he-man standards, a new study suggests. Oddly, the sperm of good-looking guys—but not necessarily macho ones with square jaws and distinct cheekbones—is just fine, reports Medical Daily . The link was found when... More »

STD Makes Crickets Mate Like Crazy

Highly contagious iridovirus also causes infertility, death

(Newser) - A newly discovered virus boosts the libido, encouraging those infected—that would be crickets, not humans—to have sex more often and with more partners. The highly contagious iridovirus transmits itself via close contact while mating, but not via insemination; it apparently passes from one's antennae to another's... More »

Town Plagued by Mystery Hum

Possible culprit: mating fish

(Newser) - "It's a really low pitched sound that literally pulsates through the house." If that sounds like the kind of noise that would drive you crazy, be glad you don't live in Southampton. The British town is collectively pulling out its hair over an unexplained hum that... More »

Some Male Marsupials Die After Marathon Mating

14-hour sessions take everything out of them: Study

(Newser) - Some male marsupials have quite the end-of-life experience: They "mate themselves to death," explains the lead author of a new study in the journal PNAS . Researchers found that in some insect-eating species, the males buck themselves up for one grand finale, then mate with as many partners as... More »

Study: Menopause All Men's Fault

Male tendency to choose younger mates gave rise to menopause: biologists

(Newser) - If you weren't already blaming the man in your life for those pesky hot flashes, now's the time to start—and you can thank McMaster University researchers for the pleasure. A study by evolutionary geneticists at the Canadian school concludes men's partiality for younger mates made fertility... More »

'Gay' Penguins to Be Split Up at Zoo

Officials want Buddy, Pedro to mate with females

(Newser) - A pair of "gay" penguins will be split up by the Toronto Zoo so that they can have chicks—with females. The so-far inseparable males “will be put in with a specific female so they have the chance to get to know one another, and if they bond,... More »

Tilting Head Boosts Your Attractiveness

Women should try to look shorter, men taller

(Newser) - How attractive you look might have a lot to do with how you tilt your head. According to a new study, women appear more comely if they tilt their faces forward so that they have to look slightly upward, while men earn higher marks if they lean their heads back... More »

Male Brains Take 'Milliseconds' to Choose a Mate

Women concentrate harder, deliberate more

(Newser) - Men take only milliseconds to determine a woman's mating compatibility, but for women it's a more complex process, according to a new study. Male genetic programming is responsible for this almost instantaneous decision-making, Dutch researchers say. In testing gender biases, groups were assigned tasks while shown photos of the opposite... More »

Ugly Fish Have Stronger Sperm

Pretty boys get the girl first and still finish last

(Newser) - Pretty, colorful guppy guys may get all the ladies, but ugly guppies have “better sperm,” researchers concluded in a recent study. The group watched tropical guppies, and concluded that the colorful men had to “invest” in their beauty at the expense of slowing down their sperm. That's... More »

Stressed Men Go for Novelty in Sex Partners

Men suddenly choose women who don't look like them

(Newser) - Men who are under stress choose different women as sex partners than they do under normal circumstances, a new study shows. Men tend to be attracted to women whose facial features are like their own, but if stress is added to the equation, they flip to females who don’t... More »

Pair of British Swans Gets Rare 'Divorce'

The birds usually mate for life, but not this time

(Newser) - A pair of British swans has done the unthinkable for the loyal species, which usually mate for life: It split up. Sarindi and Saruni had been together for two years, but both returned to an English bird sanctuary from their annual Arctic migration with brand new partners. It's only the... More »

Hooker Crabs Swap Sex for Safety

Male crabs rewarded with sex for defending neighbors

(Newser) - Selling sex is the key to survival in the seedy world of fiddler crabs, according to Australian researchers. Scientists studying the burrow-dwelling, highly territorial creatures found that male fiddler crabs fought off intruders to protect female neighbors—who lack the male's huge claw—far more often than they would aid... More »

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