Immutability Medusa Gorgon : licensed under the Creative Commons Attribution-Share Alike 2.0 Generic Credit to https://commons.wikimedia.org/wiki/File:Mask_of_the_Gorgon_Medusa,_dating_from_c._130_AD_and_found_in_the_Forum_Romanum_in_Rome,_Romisch- Germanisches_Museum,_Cologne_(8115605754).jpg 86