Chapter 1<br >Where Have All the<br > Dinosaurs Gone?<br >Once， dinosaurs ruled every ecosystem on the<br >Earth. Mammals scuttled along the sidelines， try-<br >ing to find enough to eat without being eaten or<br >stepped on<br > Troodon sometimes ate the mammals. She<br >had fierce， distinctive teeth that served her well<br >and quick reflexes that allowed her to hunt dart-<br >ing lizards， too. Her second-toe claws helped her<br >to kill or to turn over logs to look for insects.<br > On this blue-skied morning she ~vas hungry，<br >but until the sun was high enough to warm her<br >eggs while she hunted， she would stay crouched<br >over her nest. There were other nests nearby， hol-<br >lows that scalloped the ground lightly， unlined<br >with anything except the native soil. She did not<br >nudge at her eggs as she nestled closer to keep<br >them warm--turning them would have killed<br >them.<br >|<br >ill<br >li<br >O]l=[O<br ><br >