Each color transitions smoothly into the next, creating the familiar gradient. In nature, most rainbows exist because of sunlight and rain. When sunlight hits the water droplets in the air ...

We all know rainbows-those colorful arcs that appear after rain when sunlight bends through water droplets. But have you ever ...

Before its ruling concerning same-sex marriages, the Fukuoka District Court ordered visitors to remove or cover up anything showing rainbow colors, the symbol for the LGBT rights movement.

Hawaii's regular sunshine, short rain showers and clean air come together to create some of the planet's best conditions for viewing rainbows. They're such a frequent sight that a University of Hawaii ...