A male's mission is to mate with as many females he possibly can and as often as he can, n order to spread his genes as much as possible. But it doesn't stop here. If a male mates only with one female, his offspring won't have much genetic variation. But roosters come with another method: they can cont...
The day when we will see the man-animal mutants from the Ninja Turtles on the streets is approaching. British ministers have allowed the creation of human-animal hybrid embryos for scientific purposes. Last year, a ban proposal made researchers fear that medical breakthroughs will be stopped. The research involving h...
Don't think that only humans live in marriages. Wild cats, too, live in families with strict rules when it comes to sex. Only the 2-3 dominant males in a pride father the cubs. And this is the case of leopards and tigers, too. A male dominates the territory of 2-3 females, which form their harems, and they will ...
Some males are able to do anything for sex. And bugs can bring it to extremes. Praying mantis male really loses its head, as the female starts eating him during the copulation. Spider males won't lose their skin as this is the only thing left of them (the rest has already entered into the female's stomach)....
Male vanity hardly copes with the fact that in 50 % of the cases, the couple's infertility is the man's fault. It is even trickier to get him to see a doctor for a fertility evaluation. The new at-home screening test, called Fertell, has solved this. This is the first at-home device to test the concentratio...
If your health does not matter as much to you as to make you quit smoking, if the fact that the smokers' sperm can produce malformed children does not affect you, at least the fact that smoking really affects the health of your children should worry you. A team of researchers from University of Leicester Medica...
Canadian oceanographers are puzzled by bizarre photographs showing the skeleton of a large mammal popping out of an iceberg drifted near the coast of eastern Newfoundland. The six images reveal what looks like a brown rib cage and spinal column, slightly bent, sticking out of the iceberg. "Researchers throughout Cana...
There are more and more mysteries about the sharks' reproductive abilities, besides the already known facts, like the double penis and the siblings' intrauterine cannibalism. Recently, the first case of asexual reproduction (parthenogenesis) among sharks has been documented, a hammerhead female shark at a N...
Squids have excellent eyesight, a keen sense of smell, and the ability to squirt jets of dark ink that mask their escape. But these skills provide little protection against toothed whales, like the sperm whale, which hunt them ruthlessly and easily. "The numbers of squid that are eaten by sperm whales far exceed thos...
It is easy to blame it on the woman, but in 40 % of the couples, the man is the sterile part. Now, a team at the Feinstein Institute for Medical Research found an immune factor that regulates human semen, inducing fertility or sterility in a man. The macrophage migration inhibitory factor (MIF) appears to be crucial ...
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