Visible light synchronizes the human biological clock in the suprachiasmatic nuclei of the
hypothalamus to the solar 24‐hour cycle. Short wavelengths, perceived as blue color, are …

It has frequently been reported that exposure to artificial light at night (ALAN) may cause
negative health effects, such as breast cancer, circadian phase disruption and sleep …

The field of “circadian medicine” is a recent addition to chronobiology and sleep research
efforts. It represents a logical step arising from the increasing insights into the circadian …

Images of the Earth at night are an exceptional source of human geographical data,
because artificial light highlights human activity in a way that daytime scenes do not. The …

The diurnal cycle of light and dark is one of the strongest environmental factors for life on
Earth. Many species in both terrestrial and aquatic ecosystems use the level of ambient light …

Context: The sensitivity of melatonin to light suppression is expected to be higher in children
because children have large pupils and pure crystal lenses. However, melatonin …

The circadian clock imparts 24-hour rhythmicity on gene expression and cellular physiology
in virtually all cells. Disruption of the genes necessary for the circadian clock to function has …

Most studies in chronobiology focus on solar cycles (daily and annual). Moonlight and the
lunar cycle received considerably less attention by chronobiologists. An exception are …

Obesity is a common disorder with many complications. Although chronodisruption plays a
role in obesity, few epidemiological studies have investigated the association between …

External zeitgebers synchronize the human circadian rhythm of sleep and wakefulness.
Humans adapt their chronotype to the day-night cycle, the strongest external zeitgeber. The …