What network is THORChain on?

Could you please clarify for me which network THORChain is built on? Is it based on a popular blockchain like Ethereum or Bitcoin, or is it utilizing a lesser-known network? I'm interested in understanding the underlying technology and infrastructure that THORChain employs to facilitate cross-chain swaps and liquidity pools. Additionally, are there any specific advantages or benefits to using the network that THORChain has chosen? Thank you for your time and consideration.