Humans are shaped by both biological sex and socio-cultural gender see Sex and Gender Interact. Referring to women and men as "female" and "male" captures only the biological aspects; hence it is preferable to say "women scientists" or "men scientists. Differences between groups of women and men "Women" and "men" can be important social and political categories. For example, all women—regardless of social class—were prohibited from studying at European and U. Until recently, all men as a group were subject to the draft for military duty. Differences within groups There are significant differences among women and differences among men.
Why does the Catholic Church teach that marriage can exist only between a man and a woman? The truth that marriage can only exist between a man and a woman is woven deeply into the human spirit. This truth has been confirmed by divine Revelation in Sacred Scripture. The natural structure of human sexuality makes man and woman complementary partners for expressing conjugal love and transmitting human life. Only a union of male and female can express the sexual complementarity willed by God for marriage.
Why have women failed to achieve parity with men in the workplace? Meta-analyses of published studies show that those ideas are myths—men and women actually have similar inclinations, attitudes, and skills. What does differ is the way they are treated on the job: Women have less access to vital information, get less feedback from supervisors, and face other obstacles to advancement.
In the s the biologist Ronald Ericsson came up with a way to separate sperm carrying the male-producing Y chromosome from those carrying the X. He sent the two kinds of sperm swimming down a glass tube through ever-thicker albumin barriers. The sperm with the X chromosome had a larger head and a longer tail, and so, he figured, they would get bogged down in the viscous liquid.