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Lightning bolts, river deltas, tree branches, and coastlines are all examples of patterns in nature called fractals. In this Snack, you get a striking hands-on introduction to fractal patterns and how they’re formed.
Asked to get an estimate for the famed mathematical constant pi (π), try the random tossing of toothpicks.
This video describes the interaction at the exhibit Pi Toss, which uses a statistical technique called "Buffon's Needle" to calculate pi.
This circular piece of Exploratorium history has held pride of place in π Day festivities since 1988.
Use a touchscreen to search for any number hidden in the first 3 million digits of pi.