In the Bible, a rainbow symbolizes God's mercy. But what about a rainbow with no color?
Richard Toulson was out on an early morning walk in Scotland when he saw something strange in the sky.
"I noticed there was a heavy mist or light fog in the valley at Collochan. It was quite eerie. I’ve never seen one before. It’s one of the regular walking routes we do," Toulson said.
Just another reminder of nature's beauty.