humans and knowledge from the book sapiens

Humans are the deadliest and smartest living organism in the world. Who can define and destroy the earth.

humans stepped on this earth approximately before 25,000 years ago, from an ape called Australopithecus. 

But the first human species evolved from Australopithecus, differ a lot from us (Homo sapiens) in many ways.

it's common for humans to hold many other species among them like other organism. (Like cat holding cheetahs, lions etc.) 

But other human species went extinct by homo sapiens, who only arise before 10,000 years ago.

human beings differ from animals regarding the size of brain. ( Bigger the brain, bigger the knowledge.) humans have bigger brain than animals. 

The accurate reason for the extraordinary development of human brain was still unknown. but still scientist suggest few theories. The revolution of brain holds many reasons starting even from eating cooked food (Eating cooked food reduces the work to intestine which transfers it's energy directly to the brain). 

And when human brain gets bigger, the skull holding he brain also gets bigger. which makes the birth way becomes too small for a fully developed human unborn child. as a result, human babies born before they're completely developed on the womb, for example if you consider a foal which was completely developed in the womb can walk ad stand earlier than humans. but here the undeveloped child was like a clay, it can be easily constructed by the society into what they want. whereas the horse foal is like a glass, when you try to change it, it may Leads to crack in it.

and another unique thing in exist in humans is their language, even though it wasn't the first verbal language it stands to be unique because of his imagination. for example, if you consider a monkey, 

it may rise a specific sound to aware its group from a lion, And another specific sound to aware its group from eagle. Here a monkey can only say what it sees. but only humans are capable of saying that the lion coming out there is the protector of our ancestors. Humans also can change their self, according to their situation and have capacity to change their mind according to their ideologies.