https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13981229![An outline of a face expressing acute pain (left); a face showing anger. Etching by B. Picart, 1713, after C. Le Brun.](https://images.rawpixel.com/image_social_landscape/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djZXBjaDlzcDQtaW1hZ2UuanBn.jpg)
![An outline of a face expressing acute pain (left); a face showing anger. Etching by B. Picart, 1713, after C. Le Brun.](https://images.rawpixel.com/image_social_landscape/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djZXBjaDlzcDQtaW1hZ2UuanBn.jpg)
An outline of a face expressing acute pain (left); a face showing anger. Etching by B. Picart, 1713, after C. Le Brun.
An outline of a face expressing acute pain (left); a face showing anger. Etching by B. Picart, 1713, after C. Le Brun.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use