Such a beautiful sight! And so many cultures have read a meaning into it--beyond the scientific explanation. The Judeo-Christian traditionsees it as a sign of the deity's choosing to spare mankind (what's left of it) after the flood. African and Aboriginal Australians see/saw it as a creator goddess/snake. The Romans had Iris, goddess of the rainbow, who, along with Mercury brought messages to mankind. Norse tradition saw it as a bridge for heroes climbing to Valhalla.
Today, in the US, the rainbow has been claimed by groups promoting diversity and by LGBTQ groups and their allies. (Also, by little girls who love pink and purple and unicorns too.)
I gotta say, the first thing I think of when I see a rainbow these days is a heavenly 'Up yours,' to the increasingly and worryingly authoritarian governor of Florida.
"Ban this, Ron!"