Who was the most powerful european monarch of all time?

How did people in the 14th century understand black death

The first time that unmanned underwater "gliders" were used by ocean scientists to respond to an oil spill was after the

Quick! what was germany’s main goal after world war i? a) to the united states develop the plan for the league of nations b) to make france return all of the territory it had occupied during the war c) to remain a world power d) to become allies with the united kingdom