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 Seeing Dark Things: The Philosophy of ShadowsIf a spinning disk casts a round shadow does this shadow also spin? When you experience the total blackness of a cave, are you seeing in the dark? Or are you merely failing to see anything (just like your blind companion)? Seeing Dark Things uses visual riddles to explore our ability to see shadows, silhouettes, and black birds--plus... |  |  The Pythagorean Theorem: A 4,000-Year History
By any measure, the Pythagorean theorem is the most famous statement in all of mathematics, one remembered from high school geometry class by even the most math-phobic students. Well over four hundred proofs are known to exist, including ones by a twelve-year-old Einstein, a young blind girl, Leonardo da Vinci, and a future president of the... |  |  A Funny Thing Happened on the Way to the Agora: Ancient Greek and Roman Humour
Ancient Greece and Rome aren't usually remembered for their sense of humour. However, in reality the ancient Greeks and Romans often refused to take themselves seriously. Strange and outlandish activities abounded - including somebody accidentally exposing himself while dancing sideways at his wedding (those wearing bed sheets didn't... |
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