SHAREIn this episode, we sit down with Ethan (Bucky) Buchman, co-founder & CTO of Tendermint, to talk about testnets. We look into what they are, what purpose they serve and cover examples from Bitcoin, Ethereum, Cosmos and Polkadot. Links Testnets on Karl.tech The latest gossip on BFT consensus Bitcoin Testnet Ropsten Testnet Kovan Testnet Rinkeby Testnet Join the Cosmos testnet Join the Polkadot testnet RECENT EPISODES Dev Ohja on the Osmosis Story and his Return to Privacy01.04.2026 lean Ethereum Part 6: Formal Verification with Alex Hicks25.03.2026 lean Ethereum Part 5: Devnets & Upgrade Coordination with Wil...18.03.2026 check our ZK JOB boards