Description With a simple motion, a jack-in-the-box-like spring designed at NASAs Jet Propulsion Laboratory showed the potential of additive manufacturing, also known as 3D printing, to cut costs and complexity for futuristic space antennas. Called JPL Additive Compliant Canister (JACC), the spring deployed on the small commercial spacecraft Proteus SpacesMercury One on Feb. 3, 2026. []