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 Building ZK-Powered AI Guardrails with Wyatt BennoZKML10.06.2026 The Quantum Question Panel – Live from zkSummit14Quantum27.05.2026 From Access Control to Encrypted Execution with Auryn MacmillanMPC,FHE,ZK Applications20.05.2026 check our ZK JOB boards