Research shows fewer males born in U.S. during periods of stress

It is a common understanding in scientific research that the male species, in general, are frailer and experience higher rates of mortality across their lifespans than females. Now, there is evidence that among humans the ...

How gender inequality is reproduced on social media

Researchers from the Higher School of Economics analyzed 62 million public posts on the most popular Russian social networking site VK and found that both men and women mention sons more often than daughters. They also found ...

Study counts the high cost of infidelity for swift parrots

Scientists at ANU have found a chronic shortage of females in a critically endangered parrot species has led to love triangles, sneaky sex on the side, increased fighting between males and fewer babies.

Endocrine-disrupting pesticides impair frog reproduction

In a new study, researchers from Sweden and Britain have investigated how the endocrine-disrupting substance linuron affects reproduction in the West African clawed frog, Xenopus tropicalis. The scientists found that linuron, ...

Skewed sex ratios causes single fathers to bring up the young

When the balance of the sexes is skewed towards one gender, parents are more likely to split up, leaving the father to care for the offspring, says a study from an international team of scientists studying bird populations.

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