Science Freeman Dyson as remembered by Tim O'Reilly David Pescovitz

magic "Pick a number and I'll guess it": the math behind the magic David Pescovitz

cars Video: the mathematics of where to park your car David Pescovitz

Games Tetris gives you random tetrominoes, right? Rob Beschizza

design The history of Spikey, the Wolfram logo Rob Beschizza

math Can you solve the wizard standoff riddle? David Pescovitz

video Watch how 19th-century Genaille-Lucas calculating rulers work Andrea James

Kids Math theorem: the most misshapen ham sandwich can always be cut into two perfect halves Andrea James

video Numberphile looks at mathematics' undecidable statements Andrea James

Kids Mathematical conjecture generates beautiful lifelike form Andrea James

video Is mathematics invented or discovered? Andrea James

math The moving sofa math problem: still unsolved 50 years later Andrea James

video This Mondrian math puzzle yields puzzling scores Andrea James

video How a child math prodigy sees numbers as shapes Andrea James

video Mind-blowing explainer on fixed points Andrea James

maps Sierra Leone is the roundest country Rob Beschizza

politics The real story behind Indiana's celebrated attempt to legislate the value of Pi Futility Closet

math The geometry of fireworks Xeni Jardin