Herbivores have teeth which are shaped to squash and grind plants. Teeth a and b on the diagram show the herbivore's teeth. Carnivores have teeth which are shaped to slice and rip the meat they eat.

The fossilized skull of the largest rodent ever recorded ... It is thought that the three-meter-long herbivore would have roamed estuaries and forests 2-4 million years ago. The mammal, which ...