Description
Stegosaurus had spikes along its back. Triceratops had long, sharp horns. Tyrannosaurus rex was once enormous. Millions and millions of years before the primary folks lived, these attention-grabbing creatures dominated the Earth. To determine where they came from, you need to look long ago in time . . . 3.5 billion years ago! Come explore the most important mystery of all: Where did dinosaurs come from? Read and to find out!