A novel concept called Quai Network aims to produce blockchains that are significantly more efficient. Their solution is based on Proof-of-Work 2.0 and groundbreaking developments in blockchain sharding technologies. As the network expands, Quai Network's modular design allows it to scale horizontally to handle additional users. The Quai Network Golden Age testnet has been made available. By performing certain testnet tasks, participants will be able to get prizes from a 10 million Mainnet Quai token airdrop pool.
https://qu.ai/blog/quai-networks-golden-age-tesnet-is-live