Bio art uses biotechnology as its medium. The creations of Bio art become part of evolution and, provided they are capable of reproduction, can last as long as life exists on earth. They raise questions about the future of life, evolution, society and art. Currently the dominant aspect of Bio art is Genetic art, as represented by the Brazilian-born artist Eduardo Kac, who genetically engineered a green fluorescent rabbit in 2000. As scientists continue their pioneering work into biotechnology, artists are also experimenting with cell and tissue cultures and neurophysiology. An example of this is the Australian-based duo Oron Catts and Ionat Zurr who have attempted to grow a quarter scale replica of an artist's ear.