Image 1 (IMAGE) Florida Museum of Natural History Caption Three new species of walnuts have been found above the Arctic Circle, remnants of a time when the North and South Poles were covered in forests. Credit Florida Museum photo by Jeff Gage Usage Restrictions Credit must be given to the creator. License CC BY 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.