Continuing his exploration of nature, art, and machines, Esteban Agosin Otero brings Mineral Acoustic Resonance (M.A.R.) to Center on Contemporary Art (CoCA) a year after his previous outdoor installation M(ol)AR (2024). Both pieces are sound art installations that explore the use of organic materials for antennae. Otero’s new work continues the experimental design of antennae fabrication to amplify the sound territories emitted by electromagnetic fields. Seawater, rich in electrolytes, is again deployed as a conductive medium. As Otero describes it, “M.A.R. concerns the interaction between water, minerals, flows, communication and currents. Seawater functions as a conductor of electricity, a medium for capturing sound, and a bridge that binds places, signals, and memories with water and currents, weaving together sounds, images, and entities—blurring the boundaries between here and there, presence and transmission, the invisible and the inaudible.” In the installation at CoCA, amplified sound moves seawater particles, generating mechanical vibration, resulting in a very quiet sound, audible if visitors approach the membrane closely.