What did the leakeys discover in olduvai gorge? -an early human settlement -prehistoric stone tools -a complete human skeleton -sets of neanderthal footprints need answer asap

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?

How did inca develop their road system? a) they used mortar to hold the stones together. b) they built suspension bridges over rivers. c) they mixed copper and stone together to make the blocks. d) they laid roads in the cities, not in the less densely populated deserts.