The researchers first showed that structures on the animal's head were probably sensory organs, then found it could detect electric fields in water.

BBC: Dolphin hunts with electric sense

"If you understand the distribution of these structures in the skin of a prey animal, you can understand something about predator-prey interactions, and it might explain some of the hadrosaur fossils we see with these bite marks, " he said.

BBC: Dinosaur mummy yields its secrets