While there is no practical limit on what types of people can form a friendship, friends tend to share common backgrounds, occupations, or interests and have similar demographics.
Approximately 800,000,000 humans live in the Southern Hemisphere, representing only 10â12% of the total global human population of 7.3 billion. This is due to the fact that there is significantly less land in the Southern Hemisphere than in the Northern Hemisphere.
Australia's location: a global perspective. If you were to split the Earth across the equator (the imaginary line around the middle of the Earth) you would have two equal halves called hemispheres. The word hemisphere comes from a Greek word meaning half of a sphere.