the.com/porosity
The art of being mostly nothing while pretending to be solid.
means The fraction of a material made up of empty space, holes, or gaps versus actual stuff.
from From Greek 'poros,' a passage or pore, via Latin 'porositas' — literally the quality of being full of doorways.
Bone truthHealthy bone is roughly half empty space.
Sponge logicHigh porosity means more room to absorb.
Hair sciencePorous hair drinks dye and loses it fast.
Earth's plumbingRock porosity stores groundwater and oil underground.