Troodon is possibly the brightest of all dinosaurs. Its brain is the largest in relation to its body weight, the measure palaeontologists use to determine intelligence. It also has large eyes, which indicates good sight and the fact that it can probably see well even as dusk begins to fall. These abilities, combined with its speed, make Troodon a very competent hunter.

Tyrannosaurus Rex

Without a doubt, the most famous species of dinosaur is Tyrannosaurus rex. First discovered by Barnum Brown in 1902, this immense meat-eating dinosaur soon captured the public imagination. However, even though we have been studying it for over 100 years, there are still plenty of things we don't know about Tyrannosaurus rex.

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