$2.99 | Mad Science: Einstein's Fridge, Dewar's Flask, Mach's Speed, and 362 Other Inventions and Discoveries That Made Our World (Kindle ebook)

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365 days of inventions, discoveries, science, and technology, from the editors of Wired Magazine. On January 30, Rubik applied for a patent on his cube (1975). On the next day, 17 years earlier,...

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