A living, ever-changing entity — Lygia Clark’s modular sculpture, ‘Bicho’ or ‘critter’, demands viewer engagement and activation. A founding member of the Brazilian Neo-Concrete movement, along with Helio Oiticia and Lygia Pape, Clark rejected formal abstraction, embracing a geometric approach informed by subjectivity and the experiential elements of the works. Her ground-breaking ‘Bichos’ series from 1960–66 consisted of hinged metal sculptures with articulated rectilinear forms and curved plan