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Incredibly complex machine plays music with marbles
There have been plenty of impressively elaborate musical machines in recent years, but this might top them all. Swedish band Wintergatan has crafted a Musical Marble Machine that, as the name suggests, churns out tunes using 2,000 marbles (technically, ball bearings). It's a pretty involved effort with 3,000 parts that include a crank, levers, conveyor belts and legions of spinning gears -- Rube Goldberg would be proud, especially if he knew that this beast took 14 months to make.
