10 mysteries about prehistoric humans

How we evolve is still a question without an answer. After all, in the evolution of mankind, what steps have appeared first? Why do we evolve, follow this development direction and not another direction? Why do we still exist? In our evolution, can we follow other ways to develop? Will our future evolve or not? .

10 major issues about ancient people have yet to get official answers from scientists .

10. Why do we have a big brain?

There is no doubt that a big brain has made people an absolute superiority in this world. But to maintain the brain to function normally, we have to pay an incredible price. The brain only accounts for 2% of the body's weight, but consumes 20% of the body's energy. Until 20,000 years ago, if we counted on our bodies, our ancestors' brains were almost no bigger than monkeys and gibbons.

But what causes our brains to get bigger and bigger? One possibility is that brain development helps our ancestors to create good tools. Another reason is that, with a large brain, it can help people communicate more easily. It is also possible, the constantly changing circumstances also force our ancestors to constantly change the world and evolve the bigger brain.

9. Why do people use their legs to go?

Before our ancestors knew how to use stone tools or evolve into larger brains, humans stood up straight with their legs . But the problem is: Why do humans evolve in the direction of standing with two legs, but our other relatives have to use four limbs?

Scientists think that, as a two-legged animal, it is possible that exercise will reduce energy more than four limbs many times. Liberation or hands have allowed our ancestors to be convenient when carrying food. Standing upright, can even help people more convenient in keeping heat, reducing the area of ​​skin contact with the sun.

8. Where did human hair disappear?

Compared to our other hairy relatives, the appearance of the human body can be considered unique. Why do we develop in this direction? One explanation is that when our ancestors crossed the hot African steppe to explore, the removal of the outer coat was the best heat dissipation.

Another explanation is that reducing the coat is a way to reduce parasites and other infectious diseases. There is an even more extreme view that when our ancestors lived in the water, it developed into a hairless body, but compared to aquatic mammals, they still had a layer. Thick fur to cover the body.

7. Why are our relatives most extinct?

About 24,000 years ago, Homo sapiens 'smart people' were not the only species that existed in the world. The ' relatives ' closest to us, the Neanderthals are still not completely extinct. In Indonesia, it was discovered that ' Hobbit' , a branch of humans, could live up to 12,000 years ago.

Why are they extinct but our branch still exists? Is it because of certain infectious diseases or extreme circumstances that have caused them to become extinct? Or because the 'advanced and noble' people we have destroyed those underdeveloped people?

6. Are people still evolving?

Recent findings show that people are not only evolving but also evolving very quickly. Since agricultural technology has been popularized, human evolution has been hundreds of times more than the average level of history. There are some scientists who disagree with this view.

They argue that these figures are still not sufficient to determine whether genes give us the ability to adapt to the situation. If human evolution is growing rapidly, should we ask why? Eating and illness will be pressures that force people to change their behaviors and practices.

5. What is a hobbit?

The Hobbit - a small breed discovered in 2003 on the Indonesian island of Flores. Can a species that is really extinct be called the Flores population? Are these bones of deformed Homo sapiens ?

Are they another branch of humanity that has become extinct? They may be similar to chimpanzees, but close but far apart. Solving this answer can help us understand more about human basic evolution.

4. Why modern people originate in Africa

About 50,000 years ago, people began to expand to the outside world, beyond Africa and spread all over the world (except Antarctica), including the remote islands of the Pacific Ocean. There is a surmised scientist, this migration may be related to gene mutations.

This mutation has changed our brains, leading to people wanting to change and modernize, thus giving us the ability to use complex language and tools, build society and technology. human art. Another more common view is that the behavior of change and modernization appeared very early, before people left Africa, when the population in Africa increased too high, people were forced to leave to find new lands - and the human revolution has begun.

3. Do we have junk with Neanderthals?

Can we just mate in the line? Is there a DNA of relatives in our bodies? There are speculative scientists, maybe the Neanderthals are not really extinct but are assimilated by our humans.

2. Who was the first primitive?

Scientists have discovered that many bipedal animals can be called primitive people , including the immediate ancestors of humans or relatives. Scientists are trying to find out what is the earliest primitive, to answer many of the concerns about human evolution: How adaptation has taken place for people to become People today, what steps have taken place?

1. Where does a modern person come from?

The most controversial issue with today's science is the issue of where modern humans have come from. The 'from Africa' hypothesis assumes that the evolutionary man began to come from Africa and then spread to the rest of the world, destroying fellow humans and replacing them (like a few hundred years) recently Europeans assimilated and destroyed American Indians.

The 'pluralistic' hypothesis assumes that people in different regions come from many places and gradually grow up. In different places, approaching the neighborhoods to mate and inherit each other's genetic traits , leads to the production of humanity. Now the view from 'Africa' is still the key point of view, but those who hold the 'Pluralism' perspective still hold their views on the emergence of modern people.