Even at 91, South Korean sculptor Kim Yun Shin is still making her mark on the art world. Equipped with her trusty chainsaw, Kim makes abstract works from the trunks of trees. But the recognition she's received in her homeland is relatively recent, as she spent much of her career across the Pacific Ocean in Argentina. Now, with a retrospective at one of South Korea's renowned art museums, Kim is inspiring a new generation of women in art.