Energy sources have changed a lot over time! What is one way that scientists and engineers have improved how we get energy?

*science*

Take another look at the population pyramid for france in 1950. notice the disparity between the male and female populations in the 55 to 70 year-old age group. what historical event could account for this disparity?

West africans received salt from who?

Why did the federalists support the ratification of the constitution? they believed in a strong federal government. they thought that it would end slavery. they were afraid the british would take over again. federalists believed the constitution provided just the right mix of power and limitations on power.