The creators of "SKYGLOW," a crowd-funded project showing the impact of urban light pollution through time-lapse videos, photos and a book, have another stunning video to share. In "Kaibab Elegy," filmmakers Gavin Heffernan and Harun Mehmedinović visit Grand Canyon National Park and capture a rare weather event.

In the mesmerizing video, clouds build inside the canyon almost like bubbling water filling a jacuzzi as the sun rises and sets in the background, creating the pinkest sky you've ever seen. Those clouds roll like waves in the ocean and crash against the cliffs. This phenomenon is called full cloud inversion, and it happens when cold air is trapped in the canyon and topped by a layer of warm air, which combines with moisture and condensation.

"We were extremely lucky to be there to capture it, and it's a collection of unique footage not found anywhere else," Mehmedinović says.

He and Heffernan, who journeyed 150,000 miles around the globe for their new book and video series, work with the International Dark-Sky Association, a nonprofit fighting to preserve the dark skies around the world.

Angela Nelson ( @bostonangela ) is an exhausted mom of two young daughters and two old cats, and a Pulitzer Prize-winning digital editor with more than 15 years of experience delivering news and information to audiences worldwide.