When dinosaurs thundered across the land, and enormous reptiles swam in the salty oceans, reptiles called pterosaurs ruled the ancient skies. Claire Ewart transports readers back more than ninety million years to the age of the dinosaurs as a young girl finds a fossil, and a day in the life of a pterosaur unfolds. The pterosaur finally lives out its natural life, and layers of Earth and time transform the creature into a fossil--an amazing link to the past waiting to be discovered.