Aerogels are the world’s lightest solid materials, composed of up to 99.98% air by volume. Aerogels are a diverse class of amazing materials with properties unlike anything else. Transparent superinsulating silica aerogels exhibit the lowest thermal conductivity of any solid known.
P.S. Duval Hand colored lithograph showing the “Arteries,” showing the large intestine in one Figure, 1843
Gerhard Richter, “Clouds (Pink)”
This electron micrograph shows mast cells, which are highly granulated cells of the immune system. Mast cells can be identified by their central nucleus and numerous granules containing histamine and enzymes. Upon stimulation by an antigen, the cell degranulates. This has an immune function, but is also the cause of many allergies. (medcell.med.yale.edu)
Olympia Scarry. Bubble Wrap Painting (marble / pink onyx from Iran). 2012.