A nodule for memory

The total iron contained in our body would be enough to manufacture a single screw from the ladies' watch.

The brain is only 1/20 of a second in order to accurately recognize the image fixed by the eye in general terms

The brain is only 1/20 of a second in order to accurately recognize the image fixed by the eye in general terms.

After a minute stay in the darkness, the sensitivity of the eye to light increases 10 times, after 20 minutes - 6 thousand times, after 40 minutes - 25 thousand times. At night, a person can see the light of a burning candle at a distance of 20 km.

There are so many analysts and receptors in our eye that it can be considered part of the brain.

Every second, about 100000 chemical reactions occur in the brain. The network of brain neurons is 1400 times more complex than the entire telephone network of the globe. The speed of biosignals in neurons can reach 400 km/h.

On 1 cm3 of human skin there are 100 sweat and 12 sebaceous glands, 4 m of nerve fibers, more than 150 nerve endings and about 1 m of blood vessels.

The total area of receptors reacting to smells in humans is 5 cm2, the dog has 65 cm2, and the shark has 155 cm2.

Our brain consists of 20 billion nerve cells and is able to remember daily 86 million bits of information. By the end of life, our memory can store about 100 trillion bits of information - a figure that even developers of computer technology do not even dream of.

Swiss scientists have calculated that elderly people who have a cat in their house go to the doctor 16 percent less often than do not have cats.

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