Gaia is the first implementation of the Cosmos Hub, built using the Cosmos SDK. Gaia and other Cosmos Hubs allow fully sovereign blockchains to interact with one another using a protocol called IBC that enables Inter-Blockchain Communication.

Documentation for the Cosmos Hub lives at hub.cosmos.network.

We have active, helpful communities on Twitter, Discord, and Telegram.

• Discord
• Twitter
• Telegram

With each version of the Cosmos Hub, the chain is restarted from a new Genesis state. This version will be used to upgrade cosmoshub-3 to cosmoshub-4. Mainnet is currently running as cosmoshub-3. Archives of the state of cosmoshub-1 and cosmoshub-2 are available here.

If you are looking for historical genesis files and other data cosmos/mainnet is an excellent resource.