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Eratosthenes learned about the position of the sun on June 22 by
Travel Time
The duration taken to move from one location to another.
Great Depression
A severe worldwide economic downturn that took place during the 1930s, marked by high unemployment and financial instability.
Transcontinental Railroads
Railroads that extend across a continent, linking coasts and facilitating trade and travel.
Agriculture
The practice of cultivating the soil, growing crops, and raising livestock to produce food and raw materials.
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