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Period: 11,000 BCE to 9000 BCE
First farmers
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10,000 BCE
A farmer’s best friend
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9000 BCE
Metalworking begins
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Period: 9000 BCE to 4000 BCE
Prehistoric communities
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8500 BCE
Cows and pigs
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8000 BCE
Walled settlements
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7000 BCE
Sheep and goats
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5500 BCE
Irrigation
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5000 BCE
Rice bowl
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4500 BCE
Oldest gold treasure
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4500 BCE
The copper-stone age
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Period: 4000 BCE to 3000 BCE
Early cities
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3500 BCE
Wheels for transportation
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3500 BCE
The first wheel
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3300 BCE
World’s first writing
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3200 BCE
Cuneiform
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3100 BCE
The bronze age
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Period: 2900 BCE to 2300 BCE
Trading hubs
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2600 BCE
Sewer systems
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2600 BCE
Indus script
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2500 BCE
Chinese writing
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2200 BCE
Iron
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2000 BCE
Spoked wheel
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Period: 1850 BCE to 1650 BCE
First alphabet
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1200 BCE
Chinese statues
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1200 BCE
Phoenician alphabet
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Period: 1200 BCE to 1101 BCE
The Iron Age
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800 BCE
City-states
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800 BCE
Greek alphabet
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800 BCE
Brahmi script
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Period: 800 BCE to 300
Iron-age Europe
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700 BCE
Peru and Bolivia
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600 BCE
African iron
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600 BCE
Indian steel
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500 BCE
Cast iron
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400 BCE
Gears
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300 BCE
Archimedes’ screw
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200 BCE
Iron plow
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100 BCE
Water wheel
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1 CE
Record-breaking Rome
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500
Astrolabe
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Period: 500 to 700
Byzantine bazaars
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1000
Fieldwork
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1100
Flywheel
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1190
Replacement walls
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1300
European blast furnaces
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1300
Mechanical clock
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Period: 1400 to 1500
Crop swap
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1493
Propeller
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Period: to
Factory towns
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The Industrial Revolution
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Cotton gin
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Street lights
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Reaping rewards
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Electric motor
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Steel plow
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Underground railway
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Selective breeding
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Combine harvester
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Skyscrapers
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Pneumatic tires
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Tractor
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Tanks
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Green revolution
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Gm crops
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City slickers