Light pollution is a man-made problem caused by the excessive use of artificial lights, especially at night. These lights can disrupt natural sleep cycles, waste energy, and even mislead migratory ...

Artificial light, while beneficial to humans, has disrupted the natural day-night cycle and created light pollution, negatively affecting wildlife. Humans also suffer from light pollution, ...

Sacramento is one of California’s most light polluted cities. The Bortle scale is a nine-level numeric scale measuring the night sky's brightness of specific locations with one being perfect ...

Artificial light pollution is a lesser-known factor contributing to the decline of pollinator species. Light pollution negatively impacts nocturnal pollinators like moths and bats, disrupting their ...

For much of human history, the rhythms of daily life were dictated by the sun — when to wake, when to work and when to sleep. But that all changed in the 19th century with the advent of electric light ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

For most of human history, darkness was a constant. The rhythms of nature, wildlife behavior, and even human sleep evolved under predictable cycles of day and night. In the past century, however, ...

It's almost a miracle to spot a cluster of stars owing to today's pollution levels. Sky-gazing isn't as easy as looking at the sky from your balcony or roof; finding a high-altitude, pollution-free ...