This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Expression of the Emotions Figure . Figure from Charles Darwin's The Expression of the Emotions in Man and Animals Caption reads FIG Chimpanzee disappointed and sulky Drawn from life by Mr Wood Author's signature is at bottom left See also figures by the same author Scanned from version with foreword by Konrad Lorenz published