What best describes the paleolithic period

Who was the first president of the united states (just trying to y’all get points)

It can be inferred that the dramatic increase in defense spending by germany was the result of. (a) attempts by great britain to take german colonies. ( b) fear of a two-front war against france and russia (c) the need to put down a communist rebellion (d) a competition with the allies to produce atomic weapons

Who were the people that migrated south into india and indus valley