Jan 25, 2026 Dogeon Lim biz.chosun.com Handprints inside a cave on the Indonesian island of Muna represent what researchers are calling the world's oldest known example of rock art, created at least 67,800 years ago. According to analysis by Indonesian and Australian researchers on the islands of Sulawesi, the brown-colored prints were made by blowing pigment over hands placed against the cave walls, leaving an outline. Some of the fingertips have been modified to appear more