Cardano is a third-generation blockchain that seeks to improve the limitations of Bitcoin and Ethereum through a scientific approach and formal proofs. Its native currency, $ADA , allows for fast and secure transactions with low energy consumption thanks to its *proof of stake* protocol, called Ouroboros. Unlike other networks, Cardano prioritizes scalability, sustainability, and interoperability between systems. It was created by Charles Hoskinson, one of the co-founders of Ethereum, and stands out for being based on peer-reviewed academic research. It is a promising platform for smart contracts, especially in sectors such as education, health, and decentralized finance.