Stefanos Geroulanos

In​ 1935, in southern Libya, the German painter Katharina Marr put on desert sandals and a sombrero and climbed a rope ladder hanging off the side of a 15-foot rock. She slipped a thin sheet of paper behind the ropes, held it in place with two of the ladder’s rungs and began to trace a petroglyph. Suspended a few feet to her right, her colleague Elisabeth Pauli did the same. The two...