It's quite possible that the big dinosaurs of the late Jurassic Period were here.
If more is found this could be the biggest dinosaur in North America.
Tyrannosaurs were not the only big meat-eating dinosaurs to walk on two legs.
Some of the biggest American-made dinosaurs face extinction with the 1997 model year.
It made its living nibbling plants as great big, and small, dinosaurs roamed the world.
At up to nine metres long it was the first really big dinosaur.
You go looking for big dinosaurs and that's what you find.
You're trying to crash us into a great big dinosaur, you jerk!
Now, when he could have really used the big old dinosaur, lie didn't dare chance it.
He was probably always few in number, but he helped kill off the big dinosaurs.