In this week's episode of the ZK Podcast, Anna and Guillermo chat with Yaz Khoury and Ismail Khoffi from Celestia. They discuss the preparation for the launch of the Celestia mainnet, developments since the launch, and the concept of Data Availability (DA). The episode also explores how rollups and DApp developers can utilize the Celestia DA layer, the introduction of Blobstream to enhance Ethereum's scalability, community building efforts, the modular thesis, and more.