With the drop of a marble, fall of a domino and snap of a string, Rube Goldberg machines exhibit the wackiest chains of reactions.
Famous American cartoonist Rube Goldberg became well-known for the elaborate contraptions drawn into his cartoons. These complex devices performed simple tasks in some of the most indirect ways, inspiring others to create similar machines.
Although Goldberg didn't personally make the machines showcased in his cartoons, many engineers, scientists and building-enthusiasts have brought their own to life.
Take a look at some of the craziest contraptions below for your inner-nerd's delight.
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