 I'm Brian Ford, the Director of the Digital Currents Initiative here at the MIT Media Lab and one of the co-lectures of the Future of Commerce class. One of the topics that we teach in the Future of Commerce class is about cryptocurrencies and, like, such as Bitcoin and blockchain. And we're excited to have a lot of our students come together in this Future of Commerce hackathon this weekend to think about different ways that they can leverage the blockchain for coming up with new ways to facilitate transactions that we hadn't thought about before. Great. Could you tell me a little bit about what is blockchain? I'm sure that everyone knows, but I don't. Sure. The blockchain is a decentralized public ledger that allows for peer-to-peer transactions to happen with not only currency but other assets that one might have, like property title or even a concert ticket.