Dolphins also display culture, something long believed to be unique to humans. In May 2005, a discovery in Australia found Indo-Pacific bottlenose dolphins (Tursiops aduncus) teaching their young to use tools. They cover their snouts with sponges to protect them while foraging (looking or searching for food or provisions). Using sponges as mouth protection as well as other transmitted behavior proves dolphins’ intelligence. This knowledge is mostly transferred by mothers to daughters.