The document summarizes key facts about dinosaurs from 100 million years ago: 1) There were many different types of dinosaurs but no people. The first people lived 5-6 million years ago. 2) Some dinosaurs were very large, like the Tyrannosaurus Rex which was 12 meters tall and weighed several tons, eating meat. The Brontosaurus was also very big and ate plants. 3) Dinosaurs came from eggs, which were very large. Dinosaur eggs can be seen in some museums today. There are many theories about dinosaurs.