Ferdinand Magellan voyages of discovery: Circumnavigation

 How many people survived Magellan's voyage? How many people started on the voyage? What were some of the benefits from Magellan's voyage? Why did they need to find a different passage to the east? Why did Magellan not tell his crew why they were trying to find a new way to get to the east? What was the reaction to Magellan in Portugal? What were some of the challenges in traveling across the ocean?