The photo taken on November 20, 2018 shows the fossil of the Changchun dinosaur found in Jilin Province. [Photo: Xinhua]

Scientists at Jilin University recently uncovered the earliest record of the undulated structure of dinosaur tooth enamel.

The discovery will help scientists to improve research in the evolution, eating habits and living environments of dinosaurs.

The bird-footed Changchun dinosaur was tiny, only one meter in body length, and made one of the best preserved bird-footed dinosaur fossils.

A slice of a dinosaur tooth fossil is seen under microscope. [Photo: Xinhua]

A scientist is measuring the fossil of a dinosaur. [Photo: Xinhua]

The fossilized skull of a dinosaur is seen. [Photo: Xinhua]