Which scientist discovered the theory of evolution ? crawford w. long sigmund freud charles darwin marie curie

In an effort to end the civil war, in 1864 the union planned to

How long ago was the fall of rome (in years)

Which of the following is an example of the pull factor known as economic migration? a. better educational opportunities pulling people towards a new country b. mexican laborers entering the us to work in agricultural jobs c. joining family members that are already in a new country d. crop failures driving people away from their country i am unsure on this question, i was thinking b? but i could be wrong.