Close-up of a monarch butterfly on orange flowers. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284630/free-photo-image-butterfly-flower-beeFree Image from public domain licenseKiezelmarmer in groen, bruin, geel en rood (1700 - 1850) by anonymous https://www.rawpixel.com/image/13735668/kiezelmarmer-groen-bruin-geel-rood-1700-1850-anonymousFree Image from public domain licensePapilio glaucus. Test image of eastern tiger swallowtail hind wing, at high magnification, from the UT imaging system.… https://www.rawpixel.com/image/8814427/photo-image-texture-blue-patternFree Image from public domain licenseThe Common Jezebel (Delias eucharis) is a medium sized pierid butterfly found in many areas of South and Southeast Asia… https://www.rawpixel.com/image/3339354/free-photo-image-butterfly-butterfly-public-domainFree Image from public domain licenseA damselfly whose species I do not know. Help would be appreciative. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3338085/free-photo-image-dragonfly-animal-anisopteraFree Image from public domain licenseFree abstract colorful background image, public domain art CC0 photo. https://www.rawpixel.com/image/5922888/photo-image-background-public-domain-artFree Image from public domain licenseWhite coronavirus under a Microscope. Original image sourced from US Government department: Public Health Image Library… https://www.rawpixel.com/image/2282546/free-photo-image-cell-science-virusFree Image from public domain licenseMicroscopic mold. Original image sourced from US Government department: Public Health Image Library, Centers for Disease… https://www.rawpixel.com/image/2282521/free-photo-image-mold-bacteria-cdcFree Image from public domain licenseFundoscopic view of the right eye, it's optic nerve and blood vessels supplying the retina. https://www.rawpixel.com/image/2282592/free-photo-image-eye-circle-scienceFree Image from public domain licenseA butterfly feeding on a tall yellow flower. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284533/free-photo-image-butterfly-flower-beeFree Image from public domain licenseGreen coronavirus under a microscope. Original image sourced from US Government department: Public Health Image Library… https://www.rawpixel.com/image/2282449/free-photo-image-virus-science-greenFree Image from public domain licenseIllustration of the early conditions of your planet. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3337676/free-photo-image-planet-astronomy-cc0Free Image from public domain licenseA 440X photomicrograph magnification of a hematoxylin and eosin (H&E)–stained liver tissue specimen, revealed the… https://www.rawpixel.com/image/2288342/free-photo-image-liver-biology-microscopeFree Image from public domain licenseFlowers and butterflies .Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3336832/free-photo-image-butterfly-flower-natureFree Image from public domain licenseA wasp found in much of Earth's Northern Hemisphere is the German wasp (Vespula germanica). https://www.rawpixel.com/image/3339383/free-photo-image-bee-honey-andrenaFree Image from public domain licenseMacro of yellow dragonfly thorax from below with transparent wings. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286412/free-photo-image-dragonfly-andrena-animalFree Image from public domain licenseInfluenza virus illustration in semi- transparent blue. Original image sourced from US Government department: Public Health… https://www.rawpixel.com/image/2282523/free-photo-image-micro-bacteria-influenza-virus-cdcFree Image from public domain licenseAbstract patter on the blue water surface. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286398/free-photo-image-sea-fish-water-natureFree Image from public domain licenseSmaller Than the Eye Can See. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286305/free-photo-image-animal-blue-cc0Free Image from public domain licenseA monarch butterfly on top of pink flowers. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284531/free-photo-image-flower-bee-butterflyFree Image from public domain licenseA white butterfly sitting on a green flower head. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286253/free-photo-image-butterfly-animal-blossomFree Image from public domain licenseCloseup of eyes and antennae on a grasshopper. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286457/free-photo-image-animal-cc0-creative-commonsFree Image from public domain licensePhotomicrograph of a human blood smear. Original image sourced from US Government department: Public Health Image Library… https://www.rawpixel.com/image/2282513/free-photo-image-red-blood-cells-abstractFree Image from public domain licenseFantasiemarmer in groen, geel en zwart (1900 - 1969) by anonymous https://www.rawpixel.com/image/13735549/fantasiemarmer-groen-geel-zwart-1900-1969-anonymousFree Image from public domain licenseThe eye, as seen through a microscope: two figures. Colour lithograph after R. Liebreich, ca. 1860. https://www.rawpixel.com/image/13953368/image-background-space-moonFree Image from public domain licenseA 1000X photomicrograph magnification of numerous, rod-shaped, Gram–negative, Yersinia pestis bacilli. https://www.rawpixel.com/image/2288448/free-photo-image-bacteria-laboratory-microscopeFree Image from public domain licenseGruismarmer in blauw, zwart en roze (1700 - 1850) by anonymous https://www.rawpixel.com/image/13735638/gruismarmer-blauw-zwart-roze-1700-1850-anonymousFree Image from public domain licenseInfluenza virus illustration in semi- transparent blue. Original image sourced from US Government department: Public Health… https://www.rawpixel.com/image/2282527/free-photo-image-virus-bacteria-gastrointestinalFree Image from public domain licenseThe eye, as seen through a microscope: three figures. Colour lithograph, ca. 1862. https://www.rawpixel.com/image/13956424/image-background-art-patternFree Image from public domain licenseInfluenza virus illustration in semi- transparent blue. Original image sourced from US Government department: Public Health… https://www.rawpixel.com/image/2282533/free-photo-image-science-proteins-cellFree Image from public domain licenseMagnifying glass png sticker object illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6870607/png-sticker-public-domainFree PNG from public domain licenseGreen coronavirus under a microscope. Original image sourced from US Government department: Public Health Image Library… https://www.rawpixel.com/image/2282451/free-photo-image-immune-cell-parasite-green-backgroundFree Image from public domain licenseFlea isolated on white background. Original image sourced from US Government department: Public Health Image Library… https://www.rawpixel.com/image/2282522/free-photo-image-insect-flea-usaFree Image from public domain licenseMagnifying glass png sticker object illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6870737/png-sticker-public-domainFree PNG from public domain licenseInfluenza virus illustration in semi–transparent blue. Original image sourced from US Government department: Public… https://www.rawpixel.com/image/2282553/free-photo-image-science-round-microbeFree Image from public domain licensePng cute magnifying glass sticker, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6727669/png-sticker-public-domainFree PNG from public domain licensePlaster png illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/7662073/png-white-background-peopleFree PNG from public domain licenseMagnifying glass png sticker, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/6772682/png-sticker-public-domainFree PNG from public domain licenseDragonfly wings png illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/8704831/png-butterfly-peopleFree PNG from public domain licenseA 200X photomicrograph magnification of a direct fluorescent antibody (DFA) stained sample revealed the presence of rod… https://www.rawpixel.com/image/2288444/free-photo-image-bacteria-laboratoryFree Image from public domain licenseA 100X photomicrograph magnification of a hematoxylin and eosin (H&E)–stained liver tissue specimen, revealed the… https://www.rawpixel.com/image/2288361/free-photo-image-microscope-liver-medicalFree Image from public domain licensePNG Red color virus cartoon illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/11729063/png-face-personFree PNG from public domain licensePhotomicrograph of Giemsa stained lung tissue. Original image sourced from US Government department: Public Health Image… https://www.rawpixel.com/image/2282504/free-photo-image-lung-cell-purple-abstractFree Image from public domain licenseA 100X photomicrograph magnification of photomicrograph of a hematoxylin and eosin (H&E) stained liver tissue specimen… https://www.rawpixel.com/image/2288334/free-photo-image-liver-biology-scienceFree Image from public domain licenseMicroscope png illustration, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/9746481/png-people-illustrationsFree PNG from public domain licenseMagnifying glass clipart, object illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/6864932/vector-sticker-public-domain-blueFree Vector from public domain licenseMagnifying glass clipart, object illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/6864314/vector-sticker-public-domain-blueFree Vector from public domain licenseMagnifying glass collage element, cute illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/6771488/vector-sticker-public-domain-blueFree Vector from public domain licenseDragonfly png sticker, transparent background. Free public domain CC0 image. https://www.rawpixel.com/image/9031164/png-white-background-butterflyFree PNG from public domain licensePhotomicrograph of a brain tissue specimen. Original image sourced from US Government department: Public Health Image… https://www.rawpixel.com/image/2282503/free-photo-image-brain-purple-cellFree Image from public domain licenseA 100X photomicrograph magnification of histopathologic morphology associated with the agriculturally–related… https://www.rawpixel.com/image/2288356/free-photo-image-microscope-antibody-virusFree Image from public domain license