The heart of any blockchain platform is the algorithm it uses to create blocks and validate transactions. Cardano and Ethereum use different blockchains. The major difference at the moment is that Ethereum’s Proof-of-Work blockchain is proving less flexible than Cardano’s Proof-of-Stake Ouroboros consensus protocol .
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Instead of having a copy of individual blockchains on each node (as is common in bitcoin), Cardano’s blockchain streamlines the number of nodes in a network by appointing a leaders responsible for verifying and validating transactions from a collection of nodes .
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