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The wall as a veil. (A) Charcoal drawing of a rhinoceros with red ochre marks possibly signifying a shamanistic nose-bleed; the head of a bison (bottom left) seems to be emerging from a crevice in the wall (Chauvet cave, Ardèche; Aurignacian, ∼ 29 000–32 000 BP). (B) Engraving suggesting a horse emerging from a hole (Gabaillou cave, Dordogne, France; Solutrean/early Magdalenian, ∼ 17 000–19 000 BP).
