The research team from the University of Genoa in Italy, the University of Missouri in the United States and the University of Arhat Puton in the United Kingdom conducted in-depth analysis of the relevant data in the WHO database over the past century. The results show that over the past century, the growth rate of men's height and weight has been twice that of women. The relevant research paper was published in the latest issue of Biology Letters. Previous studies have shown that there are differences in body size between males and females in many species. For many species, males are larger in size due to competition for mate or female selection. In some cases, females are larger in size due to reproductive needs. In humans, males are generally taller, heavier, and stronger than females. In the latest study, scientists utilized a dataset of millions of people collected by the World Health Organization since 1900 and selected approximately 135000 individual cases covering 62 countries for in-depth analysis. They found that due to improvements in diet and healthcare, both men and women's height and weight have increased, and the growth rate of men's height and weight is twice that of women. They believe that the rapid increase in male body size and weight may trigger a series of health problems. (New Society)