In 1822 geologist Gideon Mantill uncovered the bones and teeth of a large animal.  Three years later, he found modern lizard teeth which were similar to the mystery animal's except smaller.  Mantill had discovered this beaked, herbivorous dinosaur, one of the first to be classified.  Forten points, 
In 1822 geologist Gideon Mantill uncovered the bones and teeth of a large animal.  Three years later, he found modern lizard teeth which were similar to the mystery animal's except smaller.  Mantill had discovered this beaked, herbivorous dinosaur, one of the first to be classified.  Forten points, name this herding dinosaur whose most notable features wereits two spiked thumbs?
In 1822 geologist Gideon Mantill uncovered the bones and teeth of a large animal.  
iguanodon