Funny that this topic came up today. During my lunch break at work last night I happen to come across an article which described a dinosaur called dreadnoughtus. It was discovered in Argentina and it is believed to be the biggest terrestrial animal to ever have lived on earth. I think it has the coolest name ever so it's my new current favorite.

Even though a liopleurodon isn't a dinosaur (it's an aquatic reptile) I still think it's pretty awesome and pure nightmare fuel. Look it up.