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Ethereum is based on Bitcoin’s protocol and its Blockchain design but is tweaked so that applications beyond money systems can be supported. The two Blockchains’ only similarity is that they store entire transaction histories of their respective networks, but Ethereum’s Blockchain does a lot more than that. Besides the history of transactions, every node on Ethereum network also needs to download the most recent state, or the current information, of each smart contract within the network, every user’s balance and all the smart contract code and where it’s stored.