31st century BC

The 31st century BC was a century that lasted from the year 3100 BC to 3001 BC.

Events



 * c. 3100 BC: Polo (Sagol Kangjei) was first played in Manipur state.
 * c. 3100 BC?: The Anu Ziggurat and White Temple are built in Uruk.
 * c. 3100 BC?: Predynastic period (Neolithic) ends in Ancient Egypt.
 * c. 3100 BC?: Early Dynastic (Archaic) period starts in Ancient Egypt.
 * c. 3100 BC?: The first temple of Tarxien is in use by the Neolithic inhabitants of Malta.
 * c. 3100 BC?: First stage in the construction of Stonehenge.
 * c. 3100 BC: Oldest adobe building in the Americas was built in Peru.
 * c. 3100 BC – 2600 BC: Skara Brae, Orkney Islands, Scotland is inhabited.
 * c. 3090 BC: Narmer (Menes) unifies Upper and Lower Egypt into one country; he rules this new country from Memphis.
 * c. 3051 BC: The oldest currently living organism, a Great Basin bristlecone pine, undergoes germination in the White Mountains of California.

Inventions, discoveries, introductions

 * Drainage and sewage system in the Indus Valley
 * Dams, canals, stone sculptures using inclined plane and lever in Sumer and the Tigris–Euphrates Valley
 * Copper was in use, both as tools and weapons.
 * Senet is one of the oldest-known board games in the world.
 * c. 3100 BC – Invention of writing in Mesopotamia and Egypt
 * The Sydney rock engravings date to around 3000 BC (Sydney, Australia).