Young at ArtThe art world’s obsession with youth may be fading. With prices for even facile works by emerging talents accelerating at warp speed, collectors hunting for greater substance are turning to artists who are pushing 80, and counting. Many of these game-changers- broke out in the 1960s and ’70s and were driven by feminist, racial, and gender-identity politics to alter every existing medium and invent a few new ones. By experimenting with nascent technology and unconventional materials that included their own bodies, they opened the door for much of the video, performance, and digital art we have today.