Voles Use Their Noses To Win Sperm Wars
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The male meadow vole faces a big problem: How can it become a father when a female is likely to mate with every other male in the neighborhood?
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University of Pennsylvania researchers have figured out how to produce a continuous supply of sperm stem cells from mice, a technique that could one day be used to save endangered species or treat infertility in men.
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A bizarre hairless rodent living  underground in Africa may offer clues about the links between  stress and human infertility, scientists said on Monday.
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Climate change could be disastrous for  some animals, but male gray seals are probably not complaining  -- it has improved their sex lives.
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Scientists find that male chimpanzees will embark on crop raiding for fruit to attract a mate.
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Who needs a man? Female sharks can fertilize their own eggs with sperm, says a new study being published Wednesday.
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As competition increases, sperm banks reveal more and more about donors.
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Some brainy animal species, besides humans, campaign across sophisticated and far-flung social networks
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Researchers at the University of Pennsylvania School of Veterinary Medicine have identified the growth factors essential to allow spermatogonial stem cells -- the continually self-renewing cells that produce sperm -- to exist in culture indefinitely.
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Scientists successfully inject male monkeys with a protein that renders the chimps temporarily infertile. The research may provide a new birth-control option for men in the next decade.
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Men have been responding with enthusiasm to this winterâs influx of fur.
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What do Jim from 'The Office,' Shrek and Al Gore have in common? They're beta malesâlosers who are winning. Look out, alpha dogs.
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Do mild-mannered honeybees get just a happy buzz when they drink booze? That&#39;s one of the mysteries scientists are trying to solve in hopes of learning why some people who are normally cool and calm become aggressive and mean when they&#39;re loaded.
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Scientists in Hong Kong and China  have identified for the first time a protein in sperm from  humans and from mice that could be responsible for many  unexplained cases of male infertility.
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Scientists say they have identified the specific hormone that makes teenagers so volatile.
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Researchers say elephants can tell whether a human is a friend or foe by their scent and colour of clothing.
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Scientists have transplanted into infertile mice sperm stem cells grown in a laboratory, thus allowing the mice to reproduce -- an approach that one day might be used to cure infertility in men -- according to a study published in the November issue of