The hardest secrets about the human body

Despite the advances in technology and scientific achievements that actively support people to explore and explore the world, we still cannot decipher some of the mysteries right on our own bodies , such as at Why are people still growing pubic hair or pregnant nose more sensitive than usual?

>>>10 things continue to happen on the body of the dead

Here are the mysteries that people have not explained:

10. Pubic hair

Humans have evolved to the point of losing most of the hairs on their bodies, except in the pubic area (on the lower part of the abdomen, near the genitals). This feature can help to keep our genitalia warm or even act as a barrier to friction while doing "that".

9. Autism

About 1 in every 100 people has autism - a disease that causes language problems and social interaction. The disease may be related to abnormal childhood brain development and brain areas become easily irritated.

8. Sudden muscle jerks

Science still cannot explain why 70% of us experience the phenomenon of muscle suddenly getting jerky before sleeping. This muscle twitch can be an ancient reflex, warning a sleeping primate about to fall off a tree.

7. The nose is extremely "sensitive" when pregnant

A woman may find herself "sticking" to the vote simply through her ability to detect smells better. This special power during pregnancy is rumored to help women avoid breathing dangerous gases, which can harm an unborn baby.

6. Biological dark matter

Scientists have discovered a mysterious genetic form, which cannot be classified as animal, bacteria or virus. It accounts for 95% of the human genome and we don't know what it is.

5. The breasts are "terrible"

Unlike in other mammals, women's breasts expand permanently, even if they are not breastfeeding. Some scientists believe that the huge breasts mimic the swollen butt of our fertile monkey ancestors.

4. Right hand

No one knows why only 10% of the world's population is left-handed. Left-handed people may be surviving individuals of the "disappearing twins" syndrome, which is to live longer than their opposite twin siblings during early pregnancy.

3. Sneezing because of the sun

One-third of us sneeze when they see bright light and we still don't know why. Scientists suspect it is a neuronal harmony between stimulating light and sneezing reflexes . They call this ACHOO syndrome (Sneezing).

2. Dream

25% of our sleep every night is for dreams, but we don't know why. Psychologists Freud once identified, dreams represent sexual desires. Now scientists think they help us solve problems through metaphorical thinking.

1. Yawn

The scientific community has been yawning for 2,500 years and this action is thought to be associated with everything, from rudimentary communication to sexual stimulation. Some antibiotics even make people "top" while yawning.