San Antonio College Library

"Perhaps nudged over the evolutionary cliff by a giant boloid striking the Earth, the incredible and fascinating group of animals called dinosaurs (except for their feathered descendants) became extinct some 65 million years ago. In their place evolved an enormous variety of land creatures, especially the mammals, which in their way were every bit as remarkable as their Mesozoic cousins." "The Age of Mammals, the Cenozoic Era, has never had its Jurassic...