A pile of silicon carbide, grade 60 mesh (grain size about 0.25 mm (0.0098 in)). The picture is focus stacked from eight… https://www.rawpixel.com/image/3340927/free-photo-image-animal-cc0-creative-commonsFree Image from public domain licenseScenes from a Legend, probably (ca. 1515–1520) by Giovanni Larciani (Master of the Kress Landscapes). https://www.rawpixel.com/image/8232012/image-art-vintage-public-domainFree Image from public domain licenseSmaller longheaded locust. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3340770/free-photo-image-animal-cc0-creative-commonsFree Image from public domain licenseToday's Mass Extinction and Holocene-Anthropocene Thermal Maximum https://www.rawpixel.com/image/6073141/illustration-image-public-domain-butterfly-animalFree Image from public domain license