The diving bell spider lives the majority of its life in a bubble of air at the bottom of freshwater ponds and streams in northern and central Europe and northern Asia. To create the bubble, it somersaults on the surface of the water, catches a bubble of air, holds it over the breathing holes in the middle of its body, and then dives down and spins a silk web between underwater plants. This arachnid then swims back up to the surface, bringing down bubble after bubble until a big balloon of air is formed. It then eats and lives in…