Nowadays, many health experts say that sleep is very important, and sleeping at 9 o'clock and starting at 6 o'clock is most in line with the laws of nature. Is that really the case? Not exactly. A historian at Virginia Tech spent 65,438+06 years studying the sleep of the ancients. He found that the so-called all-night sleep was actually the result of modern technology. Before the invention of electric light, people slept in stages at night. The street was dark as soon as the sun went down before the lights went out. At night, everyone usually stays indoors and goes to bed as soon as it gets dark. Zhong Ziran wakes up at about one or two in the morning. This waking time was used by the ancients for prayer, reading, or chatting. Exercise for an hour or two, then go to bed. Scientists have found that during the waking period at night, the brain will secrete prolactin, which can make us feel calm and stimulate the brain to generate inspiration and creativity. So many people work in the middle of the night. Balzac, for example, gets up in the middle of the night and works until eight in the morning. Kafka, the novelist who wrote Metamorphosis, also slept during the day and worked at night. Until the end of19th century, people were still sleeping in stages. Later, the electric light was invented, and there were more activities at night, so people slowly gave up segmented sleep and changed to a whole period of sleep that stayed up late at night and woke up in the morning. Now some people wake up in the middle of the night and think they can't sleep. Actually, don't worry too much. You just went back to the most natural segmented sleep mode in the past. So you see, many of the lifestyles we are used to are not natural laws, but new technologies help us gradually form. Disclaimer: The above content comes from the Internet, and the copyright belongs to the original author. If there is any infringement of your original copyright, please let us know and we will delete the relevant content as soon as possible.