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Sometimes even very human actions like laughter, crying, or dreaming can be a real challenge for researchers. Here are seven common human abilities, everyday, natural and inexplicable. Have you ever stopped asking yourself – how?

Common phenomena that can not be explained Sleep: It is known that sleep is an essential element in the lives of humans and animals. No one can exist without sleep for a long period of time. Lack of sleep can directly lead to poor health, behavior change, hallucinations and eventually even premature death. At the same time, the reason why we need to sleep a quarter of our life is still unknown.

Common phenomena that can not be explained by laughing and crying: We know why we laugh or cry, but do we understand how it happens? When someone tells a funny joke, you can not help laughing out loud or when you go through difficult situations, it’s hard not to cry. It is known that strong emotional reactions cause the body to release endorphins that create the sense of euphoria, which makes us need to laugh. But how does this happen? mystery.

Common phenomena that can not be explained deja vu: Have you ever felt that you are in a certain place where you were already? De-je-woo is a French expression meaning “I’ve seen.” It describes a mysterious but common sense of recurring circumstances. Parapsychologists claim that the phenomenon is based on experiences from previous lives. Psychologists believe that this is a result of imagination based on desire and emotion, but despite the explanations, there is no scientific explanation for the phenomenon.


Dreams: Another unexplained mystery is the dream. The content and purpose of the dream has been the object of speculation for thousands of years, but what is behind it? The reason why we dream Sigmund Freud explained as a practice to the brain in which he is required to deal with emotions and desires that are subconsciously, but why does this happen? when is it happening? There is no scientific explanation.

Researchers believe that dreams occur during deep sleep through stimulation of synapses between nerve cells. According to this hypothesis, the sleep phase is divided into 2: the NREM phase (rapid eye jitter) and the REM stage (rapid eye jitter). The researchers believe that the NREM stage is a sleep state that allows energy to be preserved, whereas the REM phase, which is based on memories and emotions, is not really sleeping. So what is this?

Common phenomena that can not be explained Memory: The fact that a person wakes up every morning and remembers his name, knows everyone around him, carries memories, conducts a sequence of events, makes connections and remembers language – that’s amazing! How does that happen? What is memory? What is it made of? how is it possible?

Common phenomena that can not be explained conscience: We all know to define conscience as an internal sense of right or wrong, in the conduct of one giving positive incentive to do the right action. There is also a definition of conscience as a collection of ethical and moral principles that control or inhibit actions or thoughts. It does not really matter how we define conscience, we all know what it means, even though we can not find a scientific explanation or proof. Some people are motivated by a sense of high conscience and some are prevented from lack of conscience at all – what is behind one of the most common justifications in the world? It is not clear.

Intuition: Besides the five senses we all know, there is intuition – the ability to know without the use of reason. Intuition is something that can not be proven or investigated, but it exists, a kind of gut feeling, a flow of electricity, something cosmic that has no basis but is somehow the basis of most of our decisions. How do you explain it?

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