Hand wearing a white glove holding a syringe https://www.rawpixel.com/image/2093821/medical-injection-surgical-handView licenseScience and research. Mineral prospecting. Micro-fossils can play an important role in locating the proper spot to drill an… https://www.rawpixel.com/image/12307375/image-people-golden-technologyFree Image from public domain licenseScience and research. Studies of non-coking coals. V.F. Parry, supervising engineer of the Golden, Colorado field station of… https://www.rawpixel.com/image/12307397/image-person-golden-technologyFree Image from public domain license