Many studies are now showing that those who go without a true day/night cycle are adversely impacting their immune systems, and that's not good." All of life, all of it, has evolved with a day/night cycle - the circadian rhythm.
"And it will get worse as we creep - or rush - to a 24/7 world. "A number of health and environmental problems are due to a loss of darkness," says Dr David Crawford, executive director of the International Dark-Sky Association, a group that campaigns against light pollution. By succumbing to the temptations of 24-hour living, and ignoring or reducing our natural dark time, we could be putting our health at risk.
Our biological rhythms evolved in a time before artificial light, to take advantage of both bright days and dark nights. According to a growing band of scientists and doctors, many of us are no longer getting enough darkness in our lives. Even when we do sleep, street lamps and security lights pierce the darkness.īut our freedom from the natural constraints of day and night may have come at a price. Time is a limited resource and, to make full use of it, the night has been illuminated and occupied. We work, travel, shop, exercise and socialise in hours that used to be reserved for relaxation and sleep.
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