Compound Microscope and Case by Michel Ferdinand d Albert d Ailly 6th duke of Chaulnes and Jacques Caffieri https://www.rawpixel.com/image/14264635/photo-image-wood-art-goldFree Image from public domain licenseOrange COVID-19 paper craft background mockup https://www.rawpixel.com/image/2310794/free-illustration-psd-background-covid-blank-spaceView licenseChemistry blog banner template, editable text https://www.rawpixel.com/image/14839729/chemistry-blog-banner-template-editable-textView licenseDoctor slide glass for malaria test laboratory. https://www.rawpixel.com/image/14758376/doctor-slide-glass-for-malaria-test-laboratoryView licensePlanetarium learning center template https://www.rawpixel.com/image/14811023/planetarium-learning-center-templateView licenseCOVID-19 blog banner template, editable text & design https://www.rawpixel.com/image/14857198/covid-19-blog-banner-template-editable-text-designView licenseDNA test blog banner template https://www.rawpixel.com/image/14884199/dna-test-blog-banner-templateView licenseDoctor slide glass for malaria test laboratory microscope. https://www.rawpixel.com/image/14758374/doctor-slide-glass-for-malaria-test-laboratory-microscopeView licenseHenry (Henri) G.S. Morin looking at some microscopic slides. Photograph by L.J. Bruce-Chwatt. https://www.rawpixel.com/image/13979660/photo-image-dog-person-manFree Image from public domain license