Neptunian Ridge (IMAGE) University of Warwick Caption Artistic illustration of the Neptunian desert (left) and the Neptunian savanna (right) separated by the Neptunian ridge Credit Artistic illustration of the Neptunian desert (left) and the Neptunian savanna (right) separated by the Neptunian ridge identified in this work. © Elsa Bersier / ERC project SPICE DUNE. Usage Restrictions Artistic illustration of the Neptunian desert (left) and the Neptunian savanna (right) separated by the Neptunian ridge identified in this work. © Elsa Bersier / ERC project SPICE DUNE. 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.