Science Humongous dinosaur was 'half duck, half crocodile'

Spinosaurus, the first semi-aquatic dinosaur known to science, was larger than the fearsome Tyrannosaurus rex. 

By , Live Science Contributor

Model by Tyler Keillor, Lauren Conroy, and Erin Fitzgerald, Ibrahim et al., Science/AAAS

The fearsome Spinosaurus is one of the icons of the dinosaur pantheon. It was larger than T. rex (and larger than all other carnivorous dinosaurs, in fact), and on its back it sported a sail taller than an adult man.