Why is one side of the moon called "the dark side of the moon"?

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa

The language and religion of france developed from which people? a. the franks b. the gauls c. the anglo-saxons d. the romans

Both pictures below were taken at the same time of day, but one picture was taken in summer, and the other in winter. how can you tell which is in winter