About five thousand years ago, the rains over the Sahara began to decline and grasslands gave way to desert. The population of this region began to migrate east and south. Describe how the landforms and climate of Africa influenced the way these people lived as they settled in new areas.

Explain how tectonic plate movement creates geological events and features.

What greek scientist created a screw to move water for irrigation?

The persians landed in the plains near athens. as their army greatly outnumbered that of the greeks, the greeks hoped to find aid from nearby sparta. a long-distance runner named pheidippides was sent from athens to sparta to request , but the spartans were not able to send more soldiers at the time. regardless, the greeks were still able to win the battle. centuries later, legend developed that a runner had been sent from the battle to athens after the greek victory. after reaching athens, the runner proclaimed, "we are victorious! " and then fell to the ground and died. this legendary story is the inspiration for the modern long-distance runs that are performed today. this passage refers to the events of which battle during the persian wars? a. battle of thermopylae b. battle of salamis c. battle of plataea d. battle of marathon