PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY PASCAL GOETGHELUCK / SCIENCE PHOTO LIBRARY
Rodent skull fossil. Skull (upper right) of a prehistoric rodent Ischyzomis typus embedded in the rock it was found in. This specimen dates to approximately 30 million years ago in the Oligocene. The skull measures approximately 4 centimetres in length.
Model release not required. Property release not required.