A few years ago I tried my hand at writing a few NIH grant proposals. I struck out. I had a couple applications scored but none were funded and they didn’t really come very close. In any case, while I was researching my topic I came across the map below on the National Cancer Institute’s website:
Along with this map and question they provide an explanation:
Melanoma is more common in people who live in areas that get large amounts of UV radiation from the sun. For example, melanoma is more common in California than in Minnesota, where the sun is not as strong.