15-04-29 Lucy and other members of the early hominid species Australopithecus afarensis probably were similar to humans in the size difference between males and females, according to researchers from Penn State and Kent State University. Previous convention...

14-10-08 Being the center of attention can have its drawbacks. For female chimpanzees, being around too many rowdy males is disadvantageous when foraging for food, an effect that can ultimately interfere with her reproductive ability. These are some of the f...

13-11-19 Human noses come in all shapes and sizes. But one feature seems to hold true: Men's noses are bigger than women's. A new study from the University of Iowa concludes that men's noses are about 10 percent larger than female noses, on average, in popul...

13-07-30 The threat of infants being killed by unrelated males is the key driver of monogamy（一夫一妻制） in humans and other primates. The study by academics from UCL, University of Manchester, University of Oxford and University of Auckland, is the first...

12-06-14 Normally, male California mice are surprisingly doting（溺爱的） fathers, but new research published in the journal Physiological and Biochemical Zoology suggests that high anxiety can turn these good dads bad. Unlike most rodents, male and female C...

11-06-04 One kind of female butterfly mates only once in its life -- and then closes its wings to avoid harassment when pursued by persistent and unwanted males, a Japanese researcher said. 日本一位研究人员称，雌性红灰蝶一生只交配一次，在其它雄性红灰蝶不停地...

11-01-07 If you want to be surrounded by females on the prowl（徘徊） , it pays to be cool, at least if you are a male butterfly. In an unusual example of sex role reversals（逆转，撤销） , females actively court（招致，献殷勤） males after being exposed to...

10-11-19 We were able to show that the benefit of social bonding accrues（获得，积累） through 'the manipulation of ones' own and others' social relationships,' which is one definition of politics, said Oliver Schlke of Georg August University Gttingen in Ge...