As Independence Day approaches, people across the country are getting ready to celebrate with fireworks. Sparklers are a classic crowd-pleaser, and this week Reactions looks at the chemistry of these July 4th mainstays in super slow-motion. Watch as the special chemical composition of sparklers creates a prolonged, magical experience. Check it out here: https://www.youtube.com/watch?v=gWBcnlMHhHQ.

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