Approximately how many african-americans moved into harlem in the early twentieth century?

Why is ivan iv known as “ivan the terrible”?

European expansion into africa left native regimes intact but had a strong impact on local societies what does this mean

Can someone answer these question about vasco de gama for me: when? (when did he started his travel)from where & to where? (from where he was and then where he went to)motives? (what was his motives for traveling)accomplishments & discoveries? i will give you 15 star for answering all of these, you so much.