Which tool would you use to measure the mass of a mobile phone

How did geography influence the development of ancient greece?

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called

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)