The northern and southern lights, especially active lately, have been treating sky watchers to spectacular shows. But what causes the colors — and why shouldn't you whistle at the aurora?

A vibrant aurora display revealing how ionized particles from the sun excite oxygen and nitrogen in different atmosphere layers, creating iconic green and red aurora colors. Auroras, known for their ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (FOX40.COM) — Residents in lower latitudes ...