Brownian motion writ large...
within small medium
as light brainstorm doth
hail forth the following poem.
Across the realm of gray matter
slowly percolating within tissue
composed of neuronal, glial
and endothelial cells, and although
there must be biological rules
that determine the numbers
of cells of each subtype
and the volumes (or masses)
occupied by them,
little is known about such rules,
if they indeed exist
