-
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
-
Agriculture is the practice of growing, breeding, and caring for plants and animals that are used for food clothing, housing, transportation, and other purposes
-
Replaced "animal muscle" with fossil fuel
-
Engineer James Watt creates a engine that produces a constant rotary motion
-
The transcontinental railway starts to be built.
-
Thomas Edison invents the light bulb
-