Endless Current is a visualization of a complex biologically-inspired system. Through immersive display it presents an infinitely explorable world sustaining a virtual ecosystem of multiple species. These artificial life forms subsist within a simulated 3D fluid environment that is constrained by an amorphous landscape reminiscent of underwater or microscopic spaces. Immersed participants view virtual doubles of their hands and arms within this world, with which they can intuitively navigate the space and discover interactions with the simulated life. We believe that nature is improvisation as a complex adaptive system. As an artificial nature, Endless Current visualizes and sonifies not the specific appearance but its underlying mechanisms, allowing an open-ended space of nature-as-it-could-be and new sensorial interactions or discoveries of agency by its immersants.