July 4th is coming: How do fireworks work? What makes the colors and shapes? Hear from Marcy Towns of Purdue University. And could tariffs affect 2026 fireworks? Greenland's hefty price tag and ...

The first firework was pretty basic. A Chinese monk named Li Tian took a piece of bamboo, stuffed it with gunpowder, and threw it into a fire, producing a bang loud enough to scare away ghosts. That ...