Dr Sophie Lund Rasmussen at microscope, 2 (IMAGE) University of Oxford Caption Dr Sophie Lund Rasmussen examines sections of hedgehog jaws in the microscope to determine the age of the individuals. Credits: Rien van Wijk. Credit Dr Sophie Lund Rasmussen examines sections of hedgehog jaws in the microscope to determine the age of the individuals. Credits: Rien van Wijk. Usage Restrictions The image can only be used if credited. License Original 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.