I don’t claim that this explanation is an original insight, since it’s the kind of thing you can figure out just by thinking it over — as I did today while bored. With that said, here’s one reason why: a hot girlfriend is better at sending the signal that her boyfriend is a good catch, so that female strangers are more likely to notice him and decide to make a move on him. Even if the boyfriends of hot girls weren’t any more special than those of sub-hot girls, and even if men didn’t decide to seek out strangers for increased variety, the hot girlfriend would still bring about her own betrayal more easily than would a sub-hot girlfriend.
Researchers suggest that stromal cells derived from menstrual blood may represent a potentially unlimited, ethically unencumbered, easily collectable and inexpensive source of stem cells for use in regenerative medicine. The study found that MenSCs are easily expandable to clinical relevance and express multipotent markers at both the molecular and cellular level. The abundance and plasticity of MenSCs suggest a potential role for MenSCs in regenerative transplantation therapies for many different organs and tissues.
Female Australian painted dragon lizards are polyandrous, that is, they mate with as many males as they can safely get access to. Research has shown that this preference could therefore contribute to the maintenance of both male types within the population. Female painted dragons possess the remarkable ability to store sperm inside their reproductive tract that remain viable for a considerable amount of time, so that the sperm of different males actually compete with each other to fertilize her eggs.
Sixty-five percent of American women between the ages of 25 and 45 report having disordered eating behaviors, according to the results of an online survey. An additional 10 percent of women report symptoms consistent with eating disorders such as anorexia, bulimia nervosa and binge eating disorder, meaning that a total of 75 percent of American women surveyed endorse some unhealthy thoughts, feelings or behaviors related to food or their bodies.
New research provides the first evidence that a child’s sex is associated with the mother’s diet. A new study shows a clear link between higher energy intake around the time of conception and the birth of sons. The findings may help explain the falling birth-rate of boys in industrialized countries.
