The colorful swirls and stripes that characterize China's Rainbow Mountains would have remained hidden without the epic tectonic collision that created the Himalayas. When you purchase through links ...

Virginia residents spotted a rare surprise on the horizon on Aug. 9, prompting dozens of photos online. A vibrant rainbow cloud appeared in the sky, morphing as it rolled over the state. One viewer ...

An optical illusion is a visual phenomenon where the brain misinterprets what the eyes perceive, creating a false or misleading impression of reality. This occurs because the brain processes visual ...

“Rainbow clouds” appear because of cloud iridescence, according to the National Oceanic and Atmospheric Administration. The small water droplets or ice crystals in the cloud must be relatively the ...