What is it like to come face-to-face with the ten-foot-tall terror bird? Or stare into the mouth of the largest meat eater ever to walk the earth?

Can you imagine a millipede that is more than six feet long, or a dinosaur smaller than a chicken?

In this "actual size" look at the prehistoric world, which includes two dramatic gatefolds, you'll meet these awe-inspiring creatures, as well as many others.