Discover the origins of life on earth-from the first bacteria, through the age of giant dinosaurs, to the coming of humans. Eyewitness Prehistoric Life is an exciting introduction to what life was like many millions of years ago. We know about the great diversity of early life through fossils found in many different countries; this book describes how these fossils fit together into a giant jigsaw puzzle. Using reconstructions and authentic models, such fascinating creatures as the great dinosaurs, the ferocious sabertoothed tiger, and the giant woolly mammoth are brought vividly to life.