Tendons and cartilage are rarely preserved but this Thescelosaurus has both. The long tendons crisscrossing the backbones may have provided support for movement. The irregular shapes on the ribs are fossilized cartilage.
Thescelosaurus had a beak and cheeks like its hadrosaur relatives, but the leaf-shaped teeth show that it probably ate different types of plants. Because its forelimbs and hands are so much smaller than in hadrosaurs, it probably only walked on two legs.