"The Elephant Clock", Folio from a Book of the Knowledge of Ingenious Mechanical Devices by al-Jazari https://www.rawpixel.com/image/9185230/image-paper-art-watercolorFree Image from public domain license"Design for a Clock in the Form of an Elephant with an Indian Driver", Folio from a Book of the Knowledge of Ingenious… https://www.rawpixel.com/image/9099892/image-paper-art-watercolorFree Image from public domain license"Design on Each Side for Waterwheel Worked by Donkey Power", Folio from a Book of the Knowledge of Ingenious Mechanical… https://www.rawpixel.com/image/9099871/image-paper-art-watercolorFree Image from public domain licenseMummy and Cartonnage of Amen-nestawy-nakht (945–715 BC) sculpture in high resolution by anonymous. https://www.rawpixel.com/image/7728707/photo-image-art-public-domain-artworksFree Image from public domain license"Design for the Water Clock of the Peacocks", from the Kitab fi ma'rifat al-hiyal al-handasiyya (Book of the Knowledge of… https://www.rawpixel.com/image/9185432/image-paper-art-watercolorFree Image from public domain licenseQSRA (NASA-715) takeoff and landing trials onboard the USS Kitty Hawk, July 30th, 1980. Original from NASA. Digitally… https://www.rawpixel.com/image/440036/free-photo-image-air-force-aircraft-carrierFree Image from public domain licenseThe books of rituals compiled by Numa Pompilius being handed over to the people. Etching by G.B. Galestruzzi after Polidoro… https://www.rawpixel.com/image/13994874/image-cartoon-face-personFree Image from public domain licenseJersey cow at the Casa Grande Valley Farms. Pinal County, Arizona. Name of the cow: Ronald's Sybil Frosty. Record: for 365… https://www.rawpixel.com/image/12109934/image-cow-plant-grassFree Image from public domain licenseMost of the feed for the 715 hogs at Hillview is raised on the cooperative farm. Osage Farms, Missouri. Sourced from the… https://www.rawpixel.com/image/12273393/photo-image-cow-person-animalFree Image from public domain license