Oceanography The Official Magazine of
The Oceanography Society
Volume 26 Issue 03

View Issue TOC
Volume 26, No. 3
Pages 10 - 13


RIPPLE MARKS • Ancient Eye on Humanity: South Africa’s Blombos Cave Is a Window to Our Past—and Perhaps Our Future

Cheryl Lyn Dybas
Table of Contents
Citation Copyright & Usage
First Paragraph

"At home" is a perch high above the sea on a rocky ledge along the South African coast east of Cape Town. "Just here" is an indentation on that cliff, a cave some 35 meters above sea level and 100 meters from the coast.

Called Blombos Cave, it's a time capsule sealed tens of thousands of years ago. The cave lies near Cape Agulhas, where the Atlantic and the Indian Oceans flow into one another. The past and present—and perhaps the future—merge here as well.

The cave's opening, an almond-shaped eye, faces the sea. Once, it was shuttered by windblown sand from nearby dunes. But 20 years ago, archaeologist Christopher Henshilwood of the University of Witwatersrand, South Africa, and the University of Bergen in Norway removed Blombos' eye-patch.

What Henshilwood found would change our understanding of human history—and the likely date when our species began to use symbols to communicate information


Dybas, C.L. 2013. Ripple marks—The story behind the story. Oceanography 26(3):10–13, https://doi.org/10.5670/oceanog.2013.69.

Copyright & Usage

This is an open access article made available under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution, and reproduction in any medium or format as long as users cite the materials appropriately, provide a link to the Creative Commons license, and indicate the changes that were made to the original content. Images, animations, videos, or other third-party material used in articles are included in the Creative Commons license unless indicated otherwise in a credit line to the material. If the material is not included in the article’s Creative Commons license, users will need to obtain permission directly from the license holder to reproduce the material.