Happy Pi Day! Here's a four-year-old reciting Pi to the 50th digit in 10 seconds flat.
Mathematical! of the Day: Happy Half Tau Day! Recreational mathematician Vi Hart bakes a pie, but not in honor of Pi Day because the pi is a lie.
Obligatory of the Pi Day: Pun, Pun, Pun, Pun.
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Early Bird Special: Happy Pi Day! Here's some guy's daughter speed-reciting pi to 500 decimal places in 90 seconds.