ScienceSomewhere over the rainbowTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScience06/06/2017June 6, 2017Rainbows aren't just pretty, they're also cool examples of science at work, a symbol for the LGBT movement and - as some believe - a bridge to the world of the Norse gods.https://p.dw.com/p/2eBCoAdvertisement