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Windell of Evil Mad Scientist Laboratories noticed that the “Blueberry Blast” candies he picked up contained red cabbage extract, which, as every evil mad scientist knows, is a classic homebrew pH indicator. So he dunked three samples in baking soda solution, neutral water, and vinegar. Sure enough, visible color changes.

Sean Michael Ragan

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.