via Circadia: The beneficial powers of darkness

Artificial light illuminates our lives, allowing us to work or play through the night. But, we toy with our body clocks at severe risk to our wellbeing

For many of us, night has become day. We work, travel, shop, exercise and socialize in hours that used to be reserved for relaxation and sleep. Time is a limited resource and, to make full use of it, the night has been illuminated and occupied. Even when we do sleep, street lamps and security lights pierce the darkness.

But our freedom from the natural constraints of day and night may have come at a price. According to a growing band of scientists and doctors, many of us are no longer getting enough darkness in our lives. The theory is based on a simple premise. Our biological rhythms evolved in a time before artificial light, to take advantage of both bright days and dark nights. 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. (more)