Engineers create artificial cilia at the microscale

https://techxplore.com/news/2023-09-artificial-cilia-microscale.html

"paramecia move at 10X their own length/ second and cilia also move fluid... clear away mucus in lungs... magnetized carbonyl iron cilia work collectively like a wave by slowly moving magnet near them altering magnetic field control... cilia rows attached along sides of flat plastic base and set on top paramagnetic material cylinder... continuous wavelike action by continuously rolling magnet distorted field lines allowed each cilia to bend forward individually and snap back into place... useful to pump fluids"