According to Erika DeBenedictis, “one of the big limitations of biology are the basic building blocks themselves.”
My PhD research was on the early plate tectonic history on earth. Plate tectonics involves the movement of plates on the surface of the earth.
I asked the gardener how come, after all these years, the soil in my geranium pots is at roughly the same level.
To see cells in action, he notes a remarkable video, “Neutrophil Chasing Bacteria,” made in 1950s by a researcher at Vanderbilt University.
Self-evidently, the gravity on the surface of a planet limits the maximum size of large terrestrial organisms.