3 advantages and disadvantages
of spatial interaction

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?

Why would the composition of a meteorite resemble the earth's interior?

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)