This is clipart converted and broken apart that has been released into the public domain because the document says so, and its from NASA, a USA government agency. The publication is called "The Brain in Space:" http://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/The.Brain.in.Space.html
寶貝媽媽
astronomy、Baby、baby、brain、cartoon、child、converted、government、mother、nasa、science、space、usa
天文學、寶寶、寶寶、腦、動畫片、兒童、轉換、政府、母親、上、科學、空間、使用
資料來源：openclipart ( https://openclipart.org/ )