John Wesley Powell's Daring Voyage Through the Grand Canyon

1. What did people say had never happened in the canyon at the end of the world?

2. Why did John Wesley Powell decide to explore the dangerous canyons instead of fearing them?

3. What happened to one of Powell's boats during the journey through the rapids?

4. How many men decided to leave the expedition and climb out of the canyon?

5. What did Powell and his crew finally see when the canyon walls began to open on the thirty-seventh day?