Fourth of July fireworks in Morton, Minnesota

© Joel Sartore/National Geographic/Offset

Fourth of July fireworks in Morton, Minnesota

The citizens of Morton, Minnesota, are probably doing a repeat performance of this pyrotechnic display today as they join the rest of the US in a celebration of Independence Day. If you want to blow the minds of your family and friends at the barbecue, steer the conversation toward fireworks and casually drop this truth bomb: Gunpowder, the fuel that makes the fireworks explode, was invented in ancient China by Taoist alchemists who hoped to create an immortality elixir. That’s some dramatic irony, at least in hindsight. Be safe!