As an awe-inspiring phenomenon in the sky, the rainbow is a common occurrence. You might remember making rainbows with prisms as a science experiment on light refraction when you were in school.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...

Add Yahoo as a preferred source to see more of our stories on Google. A group of friends relaxing in a hot pot at a summer house in Kjósarhreppur, Iceland, were left stunned after witnessing one of ...

This is a rare phenomenon known as cloud iridescence.

After the storms last week, a rainbow came out in central Massachusetts — a red one. “I was just heading to my basketball league that I play in on Tuesday and Thursdays down in Marlboro,” said ...

GRAND RAPIDS, Mich. (WOOD) — It can stop you in your tracks if you spot it — a rare upside-down rainbow! This kind of rainbow formation is called a circumzenithal arc (CZA), and technically, it isn’t ...

Rainbow gravity posits that the geometry of spacetime depends on the energy of the probe, leading to an energy-dependent metric that modifies the standard dispersion relation at Planckian scales. This ...

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 ...