What Is the Zagging Zag?

The zigzag can only be described as deliberate and carving looks like it's been done with care. The shell carvings at trinil are pretty much the earliest evidence of art. It would make sense to track artistic work back to its origins to establish the human capacity for abstract thought. Three million years ago, the astralapithesines would have very likely been communicating with one another,. sharing information about food and preditors with a series of body movements not unlike modern chimpanzees.