Explore dinosaurs--the prehistoric reptiles that once dominated the Earth! Did you know that T. rex teeth were as big as bananas? Or that there was a kind of dinosaur as small as a chicken? Discover how dinosaurs lived, ate, and moved, along with how we can know so much about creatures that lived more than 245 million years ago! Ignite your scientific mind with fun facts, activities, and experiments. Try this: Touch your skin...