No, it is no longer possible to mine Ethereum. Ethereum transitioned from a Proof-of-Work (PoW) consensus mechanism to a Proof-of-Stake (PoS) system with the completion of the Merge in September 2022. This transition, finalized through the Shapella upgrade in 2023, means that Ethereum now relies on validators who stake ETH to secure the network, rather than miners who use computational power to solve complex puzzles.