Skull (Front View) in An academic physiology and hygiene (1903) vintage icon by Orestes M. Brands. Original public domain… https://www.rawpixel.com/image/10541540/image-face-person-artFree Image from public domain licenseHuman skull vintage illustration. Remixed by rawpixel. https://www.rawpixel.com/image/10870220/image-face-person-artView licenseBlank white paper on the wall https://www.rawpixel.com/image/1202168/blank-piece-paperView license