Who is known for his kinetic sculptures and mobiles, exploring the relationship between art and motion?

Alexander Calder invented the mobile sculpture. These balanced structures move with air currents. He also created stationary stabiles.

Giacometti made thin, elongated figures. Moore carved abstract forms. Calder specialized in moving sculptures exploring motion and balance.

His mobiles hang from ceilings and sway gently. Different parts move at different speeds. This creates constantly changing compositions.