The Cosmos Hub Testnets repository offers crucial resources for building and experimenting within the Cosmos ecosystem, encompassing current and archived genesis files, scripts, and configurations. The testnet initiative aims to bolster confidence and expertise among validators and full node operators by familiarizing them with Gaia operations and updates. The program consists of two persistent testnets: the Release Testnet (‘Theta’), designed for validators seeking a simulated mainnet experience and an IBC connection for other testnets, and the Interchain Security Testnet, which allows exploration of interchain security features and consumer chain management. Both testnets are managed by coordinators with control over significant voting power and substantial token faucets to support developer needs. Additionally, a local testnet setup is available for single-validator experimentation. For comprehensive setup and participation guidance, stakeholders are directed to the Cosmos Hub documentation.