Do bees with propolis achieve the effect of functional clothing?
Torben Schiffer presents on the website of the Beenature-Project electron microscopic images of holes in the propolis layer among a theory of their formation and effect. It is stated that bees create these holes on purpose to ensure the removal of moisture by water vapor diffusion. Supposedly, they achieve an effect such as that of functional clothing (like Gore-Tex) by this means that allows water vapor diffusion but prevents the permeability to water in its liquid form. Several questions arise from the article.