uncertaintimes:

Amoeba case: a single-celled amoeba (Difflugia coronata), an organism with no nervous system, is able to build this intricate, portable sand grain house.
Built by Animals - The Natural History of Animal Architecture

uncertaintimes:

Amoeba case: a single-celled amoeba (Difflugia coronata), an organism with no nervous system, is able to build this intricate, portable sand grain house.

Built by Animals - The Natural History of Animal Architecture