Final answer:
The Blombos cave discoveries include engraved ochre with parallel lines, signifying advanced cognitive abilities and symbolic art from early Homo sapiens, causing a shift in the understanding of prehistoric human behavior.
Step-by-step explanation:
The Blombos cave, located at the southern tip of South Africa and approximately 70,000 to 100,000 years old, has revealed significant artifacts, including engraved bones, necklaces of marine shell beads, engraved ochre remains, and stone tools. The discovery of these artifacts has had a profound impact on the understanding of human behavior, showcasing the complexity of cognitive development of prehistoric humans. Among the most noteworthy finds is a carved piece of ochre with a repetitive pattern of parallel lines, thought to be linked to modern human behavior and providing evidence of early Homo sapiens' capacity for symbolic art and abstraction.