The Egyptians develop an accurate 365 day calendar by basing their year on?

What is found within a ranger tower overlooking a drained lake

The physical processes that create most of earth's physical features, including mountains, are known as

Read the article titled "trans-saharan migration routes to north africa and the eu: historical roots and current trends." why do tens of thousands of sub-saharan africans try to cross the mediterranean each year? how are these refugees commonly portrayed? (site 1)