Horses and bison incised on cave wall at La Grotte des Combarelles, Les Eyzies-de-Tayac (Dordogne).

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Horses and bison incised on cave wall at La Grotte des Combarelles, Les Eyzies-de-Tayac (Dordogne). Wellcome Collection. Source: Wellcome Collection.