Zircon Crystals (IMAGE) Curtin University Caption Researchers analysed 'shock crystallized' zircon to determine the exact age of Yarrabubba. Credit Curtin University Usage Restrictions Only use with this story 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.