You may remember the experiment in 1995 in which female (presumably heterosexual)college students were asked to rate the “pleasantness” of the smell of several unwashed T-shirts that had been worn for two nights by several different male students. It showed that the more different the woman and man were in their genes (in particuar, the ones that cause immune responses), the more “pleasant” she rated his T-shirt.
In other words, the less they both had genes that serve the protective function of causing immune responses, the more likely the woman would be sexually attracted to him. On average, heterosexual couples share only about 20% of their immune system genes. So, when it comes to immune system genes, opposites do attract.Read the whole article
Farsightedness affects young children's ability to pay attention in school, which could put them at risk of falling behind in the classroom, a new study suggests. "We knew from our previous work that preschool and kindergarten children with uncorrected farsightedness have decreased early literacy, and this new study shows that there are even...Read More
Five simple health indicators can evaluate a healthy person's risk of heart damage from clogged arteries without drawing blood for medical tests, a new study finds. The new method may be an effective way to predict risk and possibly help patients make lifestyle changes that lower their chances of heart disease and strokes....Read More
You've probably heard the trendy phrase that "sitting is the new smoking." Although it's an exaggeration to equate the two behaviors -- nothing comes close to smoking in its many ruinous and deadly effects on the body -- research does show that prolonged sitting may be harmful, even if you...Read More