Leafy Bits (IMAGE) Penn State Caption This leafy branch of the fossil kauri tree Agathis zamunerae from Patagonia, 52 million years old. Molecular dates suggested that kauris are less than half that age. Credit Peter Wilf Usage Restrictions Non commercial use only 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.