Why are we so poor?
If you shave a chimpanzee and photograph his body from neck to waist, and then compare it with a photo of the same area of the human body, you will not find a difference. Musculature of these two kinds of living beings is virtually identical, however, chimpanzees about 2-3 times stronger than human.
It is not entirely clear why we are weak in comparison with our closest relatives, possibly the site of attachment of our muscles are somewhat different, or our muscle tissues are not as dense.
Why one hand we have dominated over the other?
Nine out of ten people on the planet - right-handers. However, surprisingly, not only the fact that in the world there is such a shortage of left-handers, and the fact that a man with one hand - dominant. Why do we have only one hand is superior to the other, not both hands have sufficient alacrity?
According to one theory of the dominance of one hand due to the fact that one side of the brain responsible for speech, more tortuous. But it also requires a good motor skills. Since the speech center is usually located in the left hemisphere of the brain, which is responsible for the right side of the body, the right hand is dominant in most people.
However, this theory can not explain why not all right-handed control of their speech with the help of the left hemisphere. By the way, half of it is responsible for the left-handers is the left brain.
Why should a woman big breasts?
Feeding women, as well as in female apes, filled with milk only when they need to feed the babies. However, a woman's breasts, unlike breast animal is large enough and the rest of the time. Scientists are constantly arguing, why women need such big breasts?
Most evolutionary biologists believe that the breast is used to attract the opposite sex. Men administered so misleading that surround the bust of a woman is capable of being a good nurse for the future offspring. In fact, most breast consists mainly of fat tissue, not from milk.
Anthropologists have meanwhile come to the conclusion that such a breast in women has evolved for themselves and for their children, and not to attract men, because in many cultures men did not find women's breasts sexy.
Florence Williams, author of "The Breast" (2012) suggests that women have larger breasts in order to meet the need for more energy is required to infants having a relatively large brain volume.
Hormones that exist in the breast, contribute to the accumulation of fat, which, in turn, gets into the milk during breast feeding. In other words, the fat from the breast helps shape baby's brain. However, this is only a theory, which is waiting for more serious research.
Why do we "intimate hair»?
Theories about why the man pubic hair, there are many. Some scientists believe that these coarse curly hair is a sexual ornament - a visual signal of sexual maturity, and a reservoir for pheromones.
Others believe that the vegetation in intimate places to protect these delicate parts of our body. There is also a belief that pubic hair serve as something of a "liner" in order to avoid friction during sex. However, it does not matter for what these physiological features, most of us want to get rid of them.
Who lives in us?
Oddly enough, but the part of the body actually is not "ours". At every cell for about 10 microbes that live inside our bodies and a total of 1-3 percent of the total weight of the person.
Some of the "residents" of our body to help us clean the skin, the other - to digest food, but features a huge number of microbes in our body have not been studied. In healthy people, there is a small number of viruses which, as it turned out, not only can cause the disease, but perform some other function.
We recently learned that when antibiotics kill the beneficial bacteria in our gut, we can develop autoimmune diseases (such as diabetes type 1). We few that know about viruses.
Why do we have an appendix?
The body in the form of a worm refers to the number of useless evolutionary vestiges, among which also the wisdom teeth, tailbone, etc. The appendix can be removed surgically without any obvious effects.
However, biologists have recently once again raised the question of the function of the appendix. Some believe that it helps to train the immune system during fetal development. Other researchers point out that the body serves as a "safe haven" for bacteria that aid in digestion. It hides microbes that colonize the newly gastrointestinal tract after any problems.
The biggest mystery - is the brain
How 100 trillion neural connections in our brain are working together so that we can feel alive? Many great minds think that consciousness - the biggest mystery of our body.
Neuroscientist VS Ramachandran once remarked:
"The brain of any creature, including yours, is composed of atoms that are billions of years ago it was part of a huge star. These particles drifted for many years and overcome incredible distances before gravity and chance are not connected together. These atoms represent now a conglomerate - your brain, which can not only think of these stars, but also of the ability to think and wonder of its ability to be surprised. With the advent of the human universe suddenly became aware of herself. This is the biggest mystery of all ».