NASA image of Pioneer 10's famed Pioneer plaque features a design engraved into a gold-anodized aluminum plate, 152 by 229… https://www.rawpixel.com/image/8717942/photo-image-gold-public-domain-womanFree Image from public domain licenseU.S. Navy Chief Construction Mechanic Jeffrey Niblo, with Underwater Construction Team (UCT) 2 Construction Dive Detachment… https://www.rawpixel.com/image/8727788/photo-image-public-domain-person-natureFree Image from public domain licenseCloseup of alkaline battery background https://www.rawpixel.com/image/423530/premium-photo-image-volt-alkaline-anodeView licenseConversion. Copper and brass processing. Analyzing the amount of copper and lead in the brasses. In this test the laboratory… https://www.rawpixel.com/image/12306891/image-hand-person-technologyFree Image from public domain license[Untitled photo, possibly related to: Anaconda smelter, Montana. Anaconda Copper Mining Company. Pouring copper anodes from… https://www.rawpixel.com/image/12151959/image-person-art-vintageFree Image from public domain licenseAnaconda smelter, Montana. Anaconda Copper Mining Company. Pouring copper anodes from the refining furnace; forms are… https://www.rawpixel.com/image/12152253/image-art-vintage-technologyFree Image from public domain licenseAnaconda smelter, Montana. Anaconda Copper Mining Company. Casting copper anodes by Russell Lee https://www.rawpixel.com/image/12151923/image-art-vintage-public-domainFree Image from public domain license[Untitled photo, possibly related to: Anaconda smelter, Montana. Anaconda Copper Mining Company. Pouring copper anodes from… https://www.rawpixel.com/image/12152249/image-art-vintage-smokeFree Image from public domain licenseAnaconda smelter, Montana. Anaconda Copper Mining Company. Finished and cooled copper anodes are carried by crane to a… https://www.rawpixel.com/image/12151916/image-person-art-vintageFree Image from public domain licenseProduction. B-17F heavy bomber. Machine screws to be used in building new B-17F (Flying Fortress) bombers in the Boeing… https://www.rawpixel.com/image/12307346/image-face-plant-handFree Image from public domain licenseBoeing aircraft plant, Seattle, Washington. Production of B-17F (Flying Fortress) bombing planes. Machine screws to be used… https://www.rawpixel.com/image/12339664/image-face-plant-handFree Image from public domain licenseAnaconda smelter, Montana. Anaconda Copper Mining Company. Pouring copper anodes from refining furnace; sample of copper… https://www.rawpixel.com/image/12151970/image-person-art-vintageFree Image from public domain licenseAnaconda smelter, Montana. Anaconda Copper Mining Company. Finished copper anodes ready for shipment to the electrolytic… https://www.rawpixel.com/image/12151969/image-face-plant-handFree Image from public domain licenseAmaconda smelter, Montana. Anaconda Copper Mining Company. Pouring copper anodes from the refining furnace; product at this… https://www.rawpixel.com/image/12145956/image-art-vintage-technologyFree Image from public domain licenseAnaconda smelter, Montana. Anaconda Copper Mining Company. Pouring copper anodes from the refining furnace; forms are… https://www.rawpixel.com/image/12152239/image-person-art-vintageFree Image from public domain licenseAnaconda smelter, Montana. Anaconda Copper Mining Company. Pouring copper anodes from the refining furnace; forms are… https://www.rawpixel.com/image/12146185/image-person-art-vintageFree Image from public domain licenseProduction. B-17F heavy bomber. Machine screws to be used in building new B-17F (Flying Fortress) bombers in the Boeing… https://www.rawpixel.com/image/12307669/image-plant-person-artFree Image from public domain licenseAnaconda smelter, Montana. Anaconda Copper Mining Company. Casting copper anodes by Russell Lee https://www.rawpixel.com/image/12151983/image-person-art-vintageFree Image from public domain licensePhelps Dodge refining company, El Paso, Texas. Copper anodes on conveyors. Sourced from the Library of Congress. https://www.rawpixel.com/image/12295516/photo-image-person-sky-public-domainFree Image from public domain license