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Cows are famous for having four digestive systems in their body and f you've ever wondered just how they use these to digest food then this Rube Goldberg will give you the answers.
It was created by Nova Jiang and is basically a wooden machine that represents the digest tracts of a cow.
A small ball is placed in one end of the machines - it's chews a few times before it's passed onto the next stage in a cows digestive systems.
It's an interesting idea and we think it could work even better if there was some text added to explain exactly what processes people are seeing.