https://aravarun.xyz/blog Technical essays and visual explainers by Arav Arun on machine learning, full-stack development, fintech, and blockchain. en-us Mon, 19 May 2026 00:00:00 GMT https://aravarun.xyz/assets/arav-arun.webp https://aravarun.xyz https://aravarun.xyz/blog/blockchain-explained https://aravarun.xyz/blog/blockchain-explained Sun, 18 May 2026 00:00:00 GMT Arav Arun What blockchain is, why Bitcoin emerged after the 2008 crisis, how proof-of-work secures history, and why modern crypto still matters. Blockchain