Have the characteristics needed to be an great explorer changed since columbus's time?

What happened in georgia as a result of the supreme court ruling in brown v. board of education?

The term “iron curtain” was based on an actual iron curtain that german theaters used to separate the stage from the audience in case of a fire. who or what did the “iron curtain” of the cold war separate? democratic nations from communist nations the soviet union from its allies the united states from europe europe from asia

In a short paragraph, describe the transition of rome from a republic to an empire. what was the republic like, and what caused it to become an empire? !