There is nothing more beautiful in the sky than a colorful rainbow after a storm. Sometimes we catch just a glimpse and other times the colors are vivid and bright. It can be hard to tell exactly how ...

Did you know that in the U.S. we generally count seven colors in a rainbow whereas elsewhere in the world people only count five? We all see the same rainbows but it can be tricky to count the colors ...

Data visualizations using rainbow color scales are ubiquitous in many fields of science, depicting everything from ocean temperatures to brain activity to Martian topography. But cartographers have ...