Hearts-a-Bustin', September 2017 Jessie Snow. Original public domain image from Flickr https://www.rawpixel.com/image/4029837/photo-image-plant-leaf-foodFree Image from public domain licenseFree closeup on red chili on white background photo, public domain food CC0 image. https://www.rawpixel.com/image/5902378/photo-image-background-public-domain-greenFree Image from public domain licenseFour shrews swimming and hunting for food on a grassy bank. Coloured etching. https://www.rawpixel.com/image/13953533/four-shrews-swimming-and-hunting-for-food-grassy-bank-coloured-etchingFree Image from public domain licenseFree different sorts of vegetables in bowl basket photo, public domain food CC0 image. https://www.rawpixel.com/image/5915088/image-public-domain-leaf-plantFree Image from public domain licenseVaccine bandage on women's arm. Original public domain image from Flickr https://www.rawpixel.com/image/5803515/photo-image-background-public-domain-covid19Free Image from public domain licenseSwallows' Nest, Lake St. Mary. [Estes' Park, Colorado] by Joseph Collier https://www.rawpixel.com/image/14291167/swallows-nest-lake-st-mary-estes-park-colorado-joseph-collierFree Image from public domain licenseThe skeleton of a megatherium and teeth of a fossil bear. Coloured etching by S. Springsguth. https://www.rawpixel.com/image/13966449/image-cartoon-plant-skeletonFree Image from public domain licenseJapanese oak (Quercus mongolica): tree branch with acorns. Watercolour. https://www.rawpixel.com/image/13983189/japanese-oak-quercus-mongolica-tree-branch-with-acorns-watercolourFree Image from public domain licenseFree closeup of a pile of spiraled, colorful marshmallows image, public domain CC0 photo. https://www.rawpixel.com/image/5928129/photo-image-textures-public-domain-foodFree Image from public domain licenseA person reading a book over a cup of coffee and a bowl of granola. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3336867/free-photo-image-breakfast-book-cc0Free Image from public domain licenseHazelnut collage element illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/7574723/vector-public-domain-illustrations-fruitFree Vector from public domain licensePrickly pear cactus (Opuntia species): stem and flowers. Aquatint, c.1823. https://www.rawpixel.com/image/13996706/prickly-pear-cactus-opuntia-species-stem-and-flowers-aquatint-c1823Free Image from public domain licenseFree green salad in bowl top view photo, public domain food CC0 image. https://www.rawpixel.com/image/5918718/photo-image-white-background-public-domain-plantFree Image from public domain licenseMonarch caterpillar on common milkweedPhoto by Jim Hudgins/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4028627/photo-image-plant-green-summerFree Image from public domain licenseA large crustacean (crab) next to an enlarged detail of its leg. Etching. https://www.rawpixel.com/image/13980833/large-crustacean-crab-next-enlarged-detail-its-leg-etchingFree Image from public domain licenseCombine harvester NEW HOLLAND TX66 working in a wheat field, location unknown, September 2, 2016. View public domain image… https://www.rawpixel.com/image/6112660/photo-image-public-domain-plant-blueFree Image from public domain licensePineapple collage element illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/7568230/vector-public-domain-illustrations-fruitFree Vector from public domain licenseFree purple bell pepper, capsicum, top view image, public domain vegetable CC0 photo. https://www.rawpixel.com/image/5919022/photo-image-public-domain-purple-foodFree Image from public domain licenseChocolate truffles and bar at a farmer's market. Free public domain CC0 photo. https://www.rawpixel.com/image/5918402/image-public-domain-food-chocolateFree Image from public domain licensePigs' teeth: seven figures showing the stages of development in pigs of different ages. Coloured etching, ca. 1860. https://www.rawpixel.com/image/13987817/image-animal-public-domain-foodFree Image from public domain licenseStomach and intestine from a case of poisoning by perchloride of mercury https://www.rawpixel.com/image/13968771/stomach-and-intestine-from-case-poisoning-perchloride-mercuryFree Image from public domain license