What you mostly hear about blockchain is that the price of currencies is going up, down, or nowhere. About rug pulls and other scams. Big investments and bigger losses. Sometimes you hear about a hack, which might be interesting as an opportunity to learn about security. Blockchain might seem like magic, but as engineers we like to peer under the hood, to see how parts are put together and how they interact with each other. Let’s go down and see what blockchains are made of and why they might be interesting for you.