Bipolar Core (IMAGE) Max Planck Institute of Geoanthropology Caption An example of a bipolar core from Panga ya Saidi, which are a prominent component of Later Stone Age toolkits Credit C. Shipton Usage Restrictions Please provide credit information with reuse License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.