Rare “twinned” rainbows appeared over Pensacola, Florida, with up to five arcs visible. Scientists explain how unique droplet sizes created the stunning display.

A rare "flat rainbow" has been spotted on the UK coastline. The rare phenomenon was spotted by Naomi Cars, from her home above the bay in Torquay, Devon. She had seen several rainbows that day - but ...

Icelandic residents were given a stunning visual treat when a rare lunar rainbow appeared in the night sky last week. The lunar rainbow, or "moonbow," could be seen just outside the town of ...

A double rainbow might seem even more special than spotting a single traditional rainbow in the wild. And for some people, it is. But what does a double rainbow mean? For older millennials, it goes ...