The first australians came across a land bridge from

In a scientific experiment, a is any factor that can be changed or be changed

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)

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?