There’s fascinating science behind the reason these amazing Great Lakes rocks glow

Mother Jones | Oct 17, 2020 at 12:00 PM
  • This piece was originally published in Atlas Obscura and appears here as part of our Climate Desk Partnership.
  • Some rocks contain several types of fluorescent minerals, and still others also have minerals that phosphoresce—meaning that they can hold on to some of the fluorescent light energy and continue to shine for a little while even after the light source is removed.
  • Rintamaki does his homework: He pokes around rocky beaches on Google Earth to get a lay of the land, and then visits in the daytime, to get a strong sense of the shoreline in mind, since the next time he’ll be there it will be really, truly dark.