Astrotourism is growing in popularity as more people seek out dark skies to experience celestial ... such as a Dark Sky Festival at Death Valley National Park and a viewing and lecture by an ...

While the bright city lights illuminate the night skies over Las Vegas ... you can even see the glow from within the borders of Death Valley National Park. But the impact of artificial light ...

Cool weather and the holiday season may seem like the perfect excuse to cozy up by the fire, but too many blazing yule logs can dirty the air and put some of your neighbors at risk. Hazy skies ...