60:1.10 These rapidly evolving reptilian [[dinosaurs]] soon became the [[Dominant|monarchs]] of this age. They were egg layers and are distinguished from all [[animals]] by their small [[brains]], having brains weighing less than one pound to [[control]] [[bodies]] later weighing as much as forty tons. But earlier [[reptiles]] were smaller, [[carnivorous]], and walked kangaroolike on their hind legs. They had hollow avian bones and subsequently developed only three toes on their hind feet, and many of their [[fossil]] footprints have been mistaken for those of giant birds. Later on, the [http://en.wikipedia.org/wiki/Dinosaurs#Evolution_and_paleobiogeography herbivorous dinosaurs] evolved. They walked on all fours, and one branch of this group developed a protective armor. | 60:1.10 These rapidly evolving reptilian [[dinosaurs]] soon became the [[Dominant|monarchs]] of this age. They were egg layers and are distinguished from all [[animals]] by their small [[brains]], having brains weighing less than one pound to [[control]] [[bodies]] later weighing as much as forty tons. But earlier [[reptiles]] were smaller, [[carnivorous]], and walked kangaroolike on their hind legs. They had hollow avian bones and subsequently developed only three toes on their hind feet, and many of their [[fossil]] footprints have been mistaken for those of giant birds. Later on, the [http://en.wikipedia.org/wiki/Dinosaurs#Evolution_and_paleobiogeography herbivorous dinosaurs] evolved. They walked on all fours, and one branch of this group developed a protective armor. |