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The short answer: sex.
The long (but still short) answer: I'm assuming you're referring to humans. 3.5-3.8 billions years ago was the last universal common ancestor, the species that all current species came from. A few billion years of evolution later, Homo sapiens sapiens, anatomically modern humans appear. From about 40,000 years ago until about 10,000 years ago humans colonized the planet. After the agricultural revolution ~10,500 years ago, humans were able to live sedentary lives and this led to population increase. Over the past 200 years, scientific advances allowed for much greater survival, and the world population has increased from about 2 billion to nearly 7 billion.
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What is the most populated nation in the world?
China is the most populated nation in the world.
How many most populated countries are there in the world?
There is only room for one most populated country in the world.
What's the name of most populated country in the world?
China is the most populated country in the world. -2021
What are the two most populated cites in the world?
Shanghai and Mumbai are the two most populated cities in the world!Your Welcome!
What is the second most populated country in the world?
India is the second most populated country in the world, after China.
Is Russia highly populated?
Yes, it is the 9th highest populated country in the world.
Which countries are densely populated?
Netherlands is the most densely populated country in the world
Most populated climate?
the most populated climate in the world is humid continental
What is the most populated region in word?
Japan is the most populated region in the world.
Largest populated country in the world?
The largest populated country in the world is China, with over 1.4 billion people.
Are the Netherlands sparsely populated?
The Netherlands are one of the most densely populated countries in the world.
What is the biggest populated area of the world?
The largest populated area of the world is Ahmedabad, India. In 2011 it had an official population of 6,352,254 residents.
