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 ← Previous Episode → Next Episode RECENT EPISODES The Quest for Practical iO with Machina iOResearch,Privacy,iO12.11.2025 Countdown to Q-Day with Project 11Blockchain,ZK Tech,Quantum05.11.2025 Bonus: ZK Mesh and ZK Whiteboard this week!Bonus29.10.2025 check our ZK JOB boards