A small study by University of Colorado researchers finds that just one week without man-made light can return a person to his natural sleep patterns, reports ZME Science.

Published in Current Biology, the study argues that our increased use of electrical light and reduced exposure to natural light caused modern humans to stray away from natural sleep patters and leads to overall lower sleep quality. Basically what happens is that our internal clocks will synchronize with the natural day-night cycle, but in modern society, we are subjected to so much artificial light that this pattern is disturbed. This is where the camping steps in – you get away from it all, rely only on natural light, and your body retunes, with our bodily night beginning at sunset and ending at sunrise.