THIS DAY IN SCIENCE: First Barbed Wire Patent in 1874

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The Universe in a Cup of Coffee

Reactions is joining PBS Digital Studios! Woohoo! To celebrate, we’re doing a deep dive on the surprisingly complex and beautiful chemistry behind our favorite morning beverage: coffee. The chemistry of the universe is, in a way, in your morning cup of coffee — from the evolution of caffeine as a defensive chemical weapon in plants to the swirling eddies of milk and coffee fueled by diffusion, Brownian motion and other phenomena. After watching the video, you’ll never look at coffee the same way again.

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