Last Days of the Dinosaurs - Riley BlackA fascinating exploration of the world's worst mass extinction and how it shaped all subsequent life on our planet. Picture yourself in the Cretaceous period. It's a sunny afternoon in the Hell Creek ecosystem of North America 66 million years ago. A Triceratops horridus ambles along the edge of the forest, enjoying this endless summer of the dinosaurs. But in a matter of hours, everything here will be wiped away. Lush verdure will be replaced with