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  #1 Introduction to Blockchain: Definition: Blockchain is a distributed electronic record keeping technology which stores and maintains a continuously growing list of records, called blocks, across a network of computers.  Origins: Proposed by Satoshi Nakamoto in 2008 as the technology that supports Bitcoin.  #2 How Blockchain Works: Blocks and Chains: Each block comprises a list of transactions, and a time stamp and the hash of the next block, making it hard to tamper with the chain.  Decentralization: Disposes of the necessity of a core processing center as each node or computer in the network will store a copy of the ledger.  Consensus Mechanisms: How consensus is reached on the state of the blockchain. Common ones include:  Proof of Work (PoW): Miners (nodes) use their computational resources to work through extensive algorithms to verify transactions.  Proof of Stake (PoS): Validators are selected depending on the number of coins they own and are ready to “stake”, or use as a gua