http://investr4zcyv3issfcryd7mqiflbedhtbt6h4mnbd6b2qshg7sevffad.onion/bitcoin-2010/index14.html
Whenever a node wishes to include a new transaction in the blockchain, it sends it to its peers, who then send it to their peers, and so on. In this way, it propagates throughout the network. Certain nodes, called miners, maintain a list of all of these new transactions and use them to create new blocks, which they then send to the rest of the network.