It's incredible to think how many giant beasts have roamed the land throughout Earth's 4.5 billion years. Today, we certainly have some impressive creatures living alongside us. The Antarctic blue ...
The skulls of three hadrosaur dinosaurs, Lambeosaurus lambei (top left), Gryposaurus notabilis (top right), Parasaurolophus walkeri (lower). Disclaimer: AAAS and EurekAlert! are not responsible ...