How were some of the world's most magnificent canyons formed? It's a long story that goes back millions of years. This compelling book about Earth's canyons provides students with the geological basics that will spark their interest in the forces of wind and water over time. Color photographs and fun facts enhance the engaging text, which allows readers to travel the world learning how some of the most familiar canyons formed. They'll also explore how wind and water shaped Tsangpo Canyon in Tibet, the world's deepest canyon. In a follow-up activity, kids can get their hands dirty and model some of Earth's processes themselves.