Spreading Out (image) The Earth Institute at Columbia University Share Print E-Mail Caption Rising average temperatures are making it easier for palm trees to survive in areas that are not typically considered tropical. Credit Tammo Reichgelt/Lamont-Doherty Earth Observatory Usage Restrictions Credit must be given. Share Print E-Mail 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.