At the present stage of the development of science and technology, a person has the opportunity

At the present stage of the development of science and technology, a person has the opportunity to travel long distances in a fairly short time, for example, by air travel. At the same time, many people have sleep disturbances and other vital processes. Explain the reason for these phenomena.

Of course, nature did not assume that in less than a day, a person would someday be able to fly around the entire globe. Therefore, the internal systems of the body begin to junk. First, the production of the hormone melatonin, which controls sleep cravings, changes. Secondly, the circadian rhythms associated with the mechanisms of time control in the brain are disrupted by cyclical changes in the concentration of certain substances. By the way, even cyanobacteria have such rhythms.