Suppose you are an archaeologist trying to answer this question: When did the first people migrate to North America?
Why might the answer to this question change over time? What do you think? Check all of the boxes that
apply.
O
Scientists might find new sites with human artifacts, thus providing new
evidence.
Scientist might develop new technology that helps them assign different ages
to existing artifacts.
Scientists might come up with new theories using existing evidence.
Scientists might learn more about the conditions in the world in which
prehistoric humans lived.

“[the city’s engineers excelled in areas] neglected by the greeks, such as the construction of roads and aqueducts, and of sewers that could wash the filth of the city into the tiber. they have built paved roads throughout the country, leveling ridges and filling up hollows, so as to make possible the movements of heavily loaded wagons. . and such is the quantity of water brought in by the aqueducts, that veritable rivers flow through the city and its sewers: almost every house has cisterns, waterpipes, and copious fountains.” —strabo, as quoted in empires ascendant: time frame 400 b. c.–a. d. 200 cisterns are tanks that hold water until it is needed; if a house has a cistern, it is likely to also have a. aqueducts. c. a swimming pool. b. a fish pond. d. sinks and faucets.