Artificial light acts like an extension of natural daylight, disrupting the photoperiodic signals that regulate seasonal transitions in plants.

At its core, artificial light at night (such as from street lights) masks natural light cycles. Its presence blurs the transition from day to night and can dampen the natural cycle of the moon.

At its core, artificial light at night (such as from street lights) masks natural light cycles. Its presence blurs the transition from day to night and can dampen the natural cycle of the Moon.

While completely avoiding artificial light in the modern world is impossible, being mindful of your exposure, particularly in the evening hours, could be key to protecting your health and wellbeing.

Recent research shows how artificial light can disrupt courtship among glow-worms and fireflies that rely on bioluminescence to find mates. By Bella Isaacs-Thomas. Science Dec 16.

Artificial light has disrupted people’s sleep and circadian rhythms. KPBS sci-tech reporter Thomas Fudge says it’s also affecting the sleep and behavior of other living things that share our ...