People in Iowa woke up Monday morning to a stunning "sun dog" in the sky. Many KCCI viewers sent in their photos of the phenomenon, which is caused by the refraction of sunlight by ice crystals in the ...

Every once in a while, you may look up toward the sun and see strange bright lights on either side of it. Or perhaps you'll be sitting in an aircraft, looking out the window at its shadow, and see a ...

Did you notice the stunning, colorful sight in the sky Monday morning? It wasn't a rainbow. It's called a sundog, a weather phenomenon that only happens when the conditions are just right. Stream NBC ...

It’s a colorful sight in the sky that may seem both fleeting and incomplete. Chances are you’ve seen what appears to be a sliver of bright color up there near sunrise or sunset. That’s called a sun ...

Every once in a while, you may look up towards the sun and see strange bright lights on either side of it. Or perhaps you’ll be sitting in an aircraft, looking out the window at its shadow and see a ...