Rainbow Waterfall, or Waiānuenue, on Hawai'i's Big Island is a natural wonder formed by volcanic activity and the erosive ...

Double rainbows are two arcs of colour decorating the sky – literally two for the price of one. The main rainbow is usually brighter and of the usual pattern (red on top, violet at the bottom), and ...

Rainbows are optical phenomena resulting from the interaction of sunlight, water droplets, and the human visual system, not physical objects. Scientific understanding of rainbows developed over ...