Artificial light at night (ALAN) is increasing exponentially worldwide, accelerated by the
transition to new efficient lighting technologies. However, ALAN and resulting light pollution …

The brain lacks a classic lymphatic drainage system. How it is cleansed of damaged
proteins, cellular debris, and molecular by-products has remained a mystery for decades …

Before the invention of electric lighting, humans were primarily exposed to intense (> 300
lux) or dim (< 30 lux) environmental light—stimuli at extreme ends of the circadian system's …

Introduction Light elicits a range of non‐visual responses in humans. Driven predominantly
by intrinsically photosensitive retinal ganglion cells (ipRGCs), but also by rods and/or cones …

The regular rise and fall of the sun resulted in the development of 24-h rhythms in virtually all
organisms. In an evolutionary heartbeat, humans have taken control of their light …

Ever-present in our environments, light entrains circadian rhythms over long timescales,
influencing daily activity patterns, health and performance. Increasing evidence indicates …

Melanopsin is a short-wavelength-sensitive photopigment that was discovered only around
20 years ago. It is expressed in the cell bodies and processes of a subset of retinal ganglion …

Simple Summary We examined the relationship between the circadian rhythms of activity,
wrist temperature (wT), blue light exposure (BLE) and sleep with proxies of metabolic health …

The ovarian cycle has a well-established circa-monthly rhythm, but the mechanisms
involved in its regularity are unknown. Is the rhythmicity driven by an endogenous clock-like …

Purpose Exposure to increasing amounts of artificial light during the night may contribute to
the high prevalence of reported sleep dysfunction. Release of the sleep hormone melatonin …