A large number of colorful origami cranes scattered across a table. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3297619/free-photo-image-origami-aircraft-airplaneFree Image from public domain licenseAgriculture: two Egyptian fellahin with a plough in the left foreground, in the background two oxen yolked to a similar… https://www.rawpixel.com/image/13996851/image-background-paper-catFree Image from public domain license