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15,000 BCE
Hunter-Gatherers
Early hunter-gatherer groups were small, and they migrated from place to place as different types of food became available at different times of the year -
10,000 BCE
Agricultural Revolution
Agriculture is the practice of growing, breeding, and caring for plants and animals that are used for food clothing, housing, transportation, and other purposes -
Start of Industrial Revolution
Replaced "animal muscle" with fossil fuel -
James Watt
Engineer James Watt creates a engine that produces a constant rotary motion -
Railway creation
The transcontinental railway starts to be built. -
Thomas Edison
Thomas Edison invents the light bulb -
End of Industrial Revolution