Final answer:
The Blombos Cave is approximately 70,000 to 100,000 years old. Engraved ochre found in the cave demonstrates the complex cognitive development of prehistoric humans and suggests early Homo sapiens were capable of symbolic art.
Step-by-step explanation:
The Blombos Cave, located on the southern-most tip of South Africa, is approximately 70,000 to 100,000 years old.
One of the significant findings in the Blombos Cave is engraved ochre. Ochre is a pigment that was used by prehistoric humans for artistic purposes. The engraved ochre found in the cave demonstrates a repetitive pattern of parallel incised lines, showcasing the complex cognitive development of prehistoric humans. This discovery has led some historians to believe that early Homo sapiens were capable of symbolic art.