What was the main goal of the U. S.'s Open Door policy?

What battle in the civil war was known as the bloodiest war ?

What do u think caused the size of the roman empire to change

Why was galileo galilei brought before the inquisition? for insisting that earth stands still at the center of the universe for proving that planets move in elliptical orbits for putting forth evidence that earth moves around the sun for suggesting that the sun is a star