Portugal. Côa Valley Archaeological Park. Rock no. 4 of Penascosa. Probable mating scene depicting two equids. The male is shown in three positions with a descending movement of the head (in red and orange on the sketch). Sketch © L. Luis, Parque Arqueológico do Vale do Côa.

Portugal. Côa Valley Archaeological Park. Rock no. 4 of Penascosa. Probable mating scene depicting two equids. The male is shown in three positions with a descending movement of the head (in red and orange on the sketch). Sketch © L. Luis, Parque Arqueológico do Vale do Côa.