Simple questions that still confuse science

In our life, there are simple questions that have long brought a headache for scientists.

List a few questions seemingly everyone knows - but no one explained below. 

No.1. What is a dream? 

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We all dream, it seems to be a natural activity of the brain while we sleep. However, if you ask what the dream really is and why we dream when we sleep - sadly, science has not explained thoroughly. 

No.2. Why are we startled in the dream? 

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Have you ever been dreaming of falling asleep and startled? This feeling is like when you tilt the chair so that you feel you are falling. Science does not yet have any real explanation for this feeling. 

According to some theories, this can be a mechanism that can help you sleep on trees or high soil without fear of falling. But it sounds unreasonable because humans almost never sleep on trees. Some other theories suggest that it is a mechanism that slows down the process that causes us to fall asleep. 

No.3. How can the brain store memory? 

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We do not know how the parts of the brain relate to the storage and reproduction of memories, although we know many areas of the brain that are involved in this process. 

We are only certain that there is a connection between neurons. When seeing a reminiscent object, many parts of the brain will interact with one another as we remember the rest of it. 

No.4. Why do giraffes have long necks? 

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Many scientists believe that the giraffe's long neck helps them survive and has many advantages over short neck species. Thus, that's not really true. 

The longer necks do not bring them any benefit other than being able to eat the tall leaves. Some studies have suggested that long, heavy necks make it difficult for them to mate. Then why giraffes have a long neck? That is still a question that is a headache for science. 

No.5. How do birds migrate? 

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We know that birds migrate hundreds of kilometers to lay their eggs or escape the harsh winter. But what we do not know is how they do it? 

A typical example: Cuckoos migrate and lay eggs in another nest, then fly away and build their own nest. When the chicks grow up, they somehow find the exact place where their ancestors used to live without any help. 

The scientists believe that birds can use special bio compasses, but the compass can only guide but not help finding a precise location. 

No.6. What makes gravity? 

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More than 350 years ago, Newton studied gravity. But what is the nature of gravity is so far no answer. We have understood the nature of three of the four fundamental forces of the universe ... except gravity. 

It is assumed that it was created by Graviton particles but humanity is probably still very long to prove their presence. 

No.7. How exactly does the magnet work? 

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Magnetic field is a phenomenon not strange in our universe but many things about it have not yet been explained. For example, why would a magnet be able to generate enough magnetic fields to move objects remotely and, in doing so, how could they split into two distinct poles - North and South? 

Nowadays, the nature of the special environment surrounding the charges or magnets we still call "magnetic fields" remains a mystery. 

By: Roxana Edwards

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