Microsoft Patents Human Activity Mining for Cryptocurrency Systems – Data Generated Based on Body Activity can be Proof-of-Work
For example, a brain wave or body heat emitted from the user when the user performs the task provided by an information or service provider, such as viewing an advertisement or using certain internet services, can be used in the mining process.
https://www.the-blockchain.com/2020/03/27/microsoft-patents-human-activity-mining-for-cryptocurrency-systems-data-generated-based-on-body-activity-can-be-proof-of-work/