Earth has a human population of over 8.2 billion as of 2025, with an overall population density of 50 people per km2 (130 per sq. Nearly 60% of the world's population lives in Asia, with more than 2.8 billion in the countries of India and China combined. Maleandfemalepopulation ratios vary widely acrosstheglobe, driven by factors such as birth rates, life expectancy, migration, and cultural practices. In some countries, particularly those with higher birth rates and lower life expectancy for men, females tend to outnumber males. Free and open access to global development data.World Population Prospects, United Nations ( UN ), publisher: UN Population Division. Summary ofMaleandfemalepopulations Percentage ofmalesandfemales in each ethnic group Summary. The data shows that There is a maleand a female brain just as sure as there are maleandfemale genetalia. Scientist can easily determine a person’s sex with a brain scan. Based on their own work and that of others, Moir and Jessel explain with equal parts boldness, clarity, and sureness Men are typically taller than women across all populations. According to the CDC, the average American man over 20 is 5'9" (175.4 cm) tall, while the average American woman is 5'3.5" (161.5 cm). Global Aid.A pioneering study has shown for the first time that the brains of men and women are wired up differently which could explain some of the stereotypical differences in maleandfemale behaviour, scientists have said. The ratio between the maleandfemalepopulation size is called the gender ratio. This ratio is not stable — it is shaped by biological, social, technological, cultural, and economic forces.