Some of Drew Carhart’s earliest memories remind him of his love of nature. Not just trees, flowers or birds — but the stars, planets and galaxies visible in the night sky. Fifty years ago, Carhart ...

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, ...

If you're in Washington state and missed seeing the northern lights over the weekend that resulted from a "severe" G4-level geomagnetic storm, you'll get another chance on Monday night. A second alert ...

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 ...

Looking up into the night sky and seeing the hazy arc of the Milky Way above is one of the most quietly profound experiences a person can have. That arc in the sky is actually a side view of the ...

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, ...

The Milky Way shines above the ocean off the coast of Acadia National Park in the early morning hours of Monday, April 23, 2018. (Staff photo by Gregory Rec/Portland Portland Press Herald via Getty ...