UC San Diego engineers developed a novel evaporative cooling technology employing a low-cost fiber membrane with interconnected pores that passively removes heat from electronics through evaporation. This system achieves higher heat flux dissipation with lower energy consumption compared to traditional air or liquid cooling methods, potentially reducing water use and curbing rapidly rising energy demands from growing AI and cloud computing workloads. Findings are published in Joule and mark a significant advance for sustainable data center operations.