Dinosaur Brain Fossil Revealed for the First Time

The pebble-sized specimen offers an unprecedented look into the life of a gigantic 133-million-year-old dinosaur.

October 27, 2016
1:01 PM EDT
Image: Iguanodon (left) with the discovered brain fossil and its parts highlighted. "Bc," for example, stands for braincase, while "Gm" refers to gray matter. Credit: University of Cambridge
Photo: Portions of the fossilized dinosaur brain tissue under magnification. Images a–b show what are believed to be meningeal blood vessels. Images c–f show hollow tubular structures within the brain's outer layer. Credit: University of Cambridge