Built communities beside rivers and utilized water for farming and fishing
Built houses made of mud and reeds
Domesticated animals and wild plants
Started the first irrigation system and built high levees or flood banks, and canals
Used the plow for digging and breaking hard soil
Practiced astronomy to determine planting and harvesting times
Observed the phases of the moon and movements of planets and stars
Developed a lunar calendar
Made time-tracking devices like sundials and water clocks
Made water rafts and sailboats for fishing and trading
Had various occupations like potters, weavers, artists, blacksmiths, bakers, healers, architects
Used the first wheel for pottery, carts, wagons and chariots
Had kings, queens, slaves, and priests
Built majestic architecture like palaces and temples (ziggurats)
Established one of the earliest writing systems (cuneiform)
Had number systems, multiplication, measurements, and other mathematics