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Check out this Rube Goldberg: It takes 4 minutes for the entire machine to finish. http://wiki.nasa.gov/cm/blog/whatonearth/posts/post_1275422073165.html.
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Check out this Rube Goldberg:It takes 4 minutes for the entire machine to finish • http://wiki.nasa.gov/cm/blog/whatonearth/posts/post_1275422073165.html