Even Charles Darwin struggled to explain why the bird should have this burdensome trait. When there are many potential danger related to the colourful tail, why this bird got this trait. Darwin finally got the idea of sexual selection, which provides an advantage in the competition for mates and that outweighed other disadvantages. While humans¬† are attracted to symmetrical faces and other outward signs of fitness, these birds are attracted to colourful tails. The male specific traits are evolved with the changing preferences of females. When the female tastes change, these traits go away.
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According to the report from National Survey of Family Growth, men are more willing to adopt children compared to women.¬† American men ages between 18- 44 are more than two times as likely as women in the same age group to have adopted a child. It showed that more than 1.2 million men and 613,000 women had adopted children. The reason for this difference could be partly due to men getting married and adopting their spouse’s children from a previous relationships. We all are designed to pass our gene to next generation, but this is a threat to our survival and fitness.(Continue reading)
Plug the numbers that you gathered into the Adult Fitness Test web site to get your results.
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A new study shows that being moderately fit can lower the risk of having a stroke. The findings apply to women as well as men. For moderate levels of fitness, the risk reduction ranged from 15 to 30 percent for men and 23 to 57 percent in women. Moderate level of fitness can be achieved by just walking briskly half an hour a day. The research was conducted by University of South Carolina’s Prevention Research Center.
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