On a breezy summer day just outside Santander in Spain’s northern Cantabria region, a group of children and adults gather around a 12-year-old girl. She presses her hand against an outcropping of gray limestone as a woman leans in, holding a straw to her mouth. The woman exhales sharply and blows ochre pigment over the girl’s hand. As the girl steps back to admire the outline her hand left on the rock, an eager eight-year-old boy walks up, cracking his knuckles, ready for his turn. The scene might be mistaken…
