black and white drawing of horseshoe crab

Horseshoe crabs look like living fossils. Did you know that their blood is blue? It’s the copper in it, that gives it that color.

Another strange thing: what looks like a small nose at the front of the shell, with dots that look like nostrils, is actually another set of light-sensing eyes.

Carbon dusk and pen and ink, on Duralar film.

Horseshoe crab: Limulus polyphemus