Why was it hard for European explorers of the 15th and 16th centuries to understand the diversity of the native Americans?

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?

What were four reasons for the decline of spain as a world power

Why was lee unable to escape from appomattox? he didnt not have the needed supplies grant had him surrounded davis had ordered him to surrender he was waiting for johnston to bring reinforcements