Characteristics show that humans are the most 'unique' creatures on the planet

Since ancient times, people have always wished to have the special abilities of animals. When compared to gorillas, tigers, hay, eagles, human bodies seem to be weak. But actually, we don't understand all about ourselves.

The animal world has a multitude of interesting things. Many animals have superior abilities, such as ants that can lift objects that are tens of times more massive than the body, the eagle can see clearly a rabbit about kilometers away, or water bears that can survive under conditions extreme environment.

The person we say is also an animal among them. While always proud of his intelligence, but when compared to characteristics different from the rest of the species, human body structure seems to be trivial. The strength, size, and sensory sensitivity of our species are only in the middle range.

But drill up in low self-esteem. In fact, if compared to all aspects, people still deserve to be the most interesting and strange species, because there are "unique" characteristics only we possess, not any other species.

1. Man is the only creature on land who experiences menopause

Most animals maintain fertility until death. As for humans, our lifespan lasts for a long time after all eggs have been shed - or menopause .

Only two non-human animals have been identified as menopausal, the killer whale and the short fin whale. However, they are all marine species, meaning that humans are the only animals on land that go through this period.

2. Only human women have a growing "double mountain"

In primates, females have mammary glands that grow and stretch only in the period when they breastfeed, the rest of their breasts are quite flat. Only in our women, this body is always full of body because it is filled with fat tissue, in addition to raising children, this is obviously an attractive symbol of female sex.

3. Humans are the only species . fainting when they see blood

This unique reaction is called the vasovagal syncope (vasovagal syncope) and is unique in humans.

The cause of the reaction is not well understood, but there is a theory that this is an excessive effort by the body when encountering some stressors, to bring us back to a state of relaxation.

4. Babies who are born too "early"

While other gibbons of the gibbons are born when the body structure is about 70% complete, the human species is born with a body that is only 20% complete. In fact, only humans have a childhood that lasts for ten years.

The cause of this may be explained by the fetal big brain and upright posture which makes it difficult for the mother to give birth. So humans have evolved to be able to give birth when the body is not fully developed.

5. People sleep the least in primates

The average person spends 7 hours of sleep each night, and that is the least amount of sleep in the primates. Not even half the sleep time of many of our "relatives".

However, even though it is short, people's sleep quality is higher. With REM during sleep, it is related to the dream, which accounts for the highest proportion of all primates. Scientists believe that short but deep sleep has been inherited from our ancestors when leaving the tree to fall asleep on the ground.

6. Humans are the only animals with clear whites

Biologists say that the whites in the eyes are sharper and more prominent than all other species. The reason is that our eyes over time are used much for non-verbal communication activities.

The large white eyes will highlight the movements of the iris, ie the iris, thereby helping to convey more expressiveness to the opposite person.

7. Laughing "bared teeth" when happy can be said to be exclusive in humans

As for the vast majority of other species, the manifestation of teeth shows a warning to the opponent . quickly turn away or eat a blow!

8. Humans are the only animal to drink milk from other species

Of course, there are still some cases where the mammal species mistakes the offspring of another species, such as the mother-tiger dog, or the mother-puppy ., but is still very rare. Only humans see other mammal milk as a permanent food, and we are also the only species that has a habit of continuing to drink milk as an adult.

9. Only humans do not have . penis bones

The penis, also known by its professional name "baculum", works to enhance the ability of the male to breed, by maintaining the ability to erect, thereby prolonging the mating time.

However, in our species, mating competition gradually decreases, no longer so harsh as with other species. Most individuals follow monogamy. So the bone fragment in the "quarter" of the selection process has become surplus, and eventually disappears in the eyebrow.

1. The 'very' human characteristics of animals may not be known to you