39th century BC

Millennium:	4th millennium BC
Centuries:	40th century BC 39th century BC 38th century BC
Decades:	3890s BC 3880s BC 3870s BC 3860s BC 3850s BC 3840s BC 3830s BC 3820s BC 3810s BC 3800s BC
Categories:	Births – Deaths Establishments – Disestablishments

Events

A replica of the Sweet Track

The Post Track, an ancient causeway in the Somerset Levels, England, is built, ca. 3838 BC. It is one of the oldest engineered roads discovered in Northern Europe.
The Sweet Track, an ancient causeway also in the Somerset Levels, the oldest timber trackway discovered in Northern Europe, is built in 3807 BC or 3806 BC, tree-ring dating (Dendrochronology) enabled very precise dating.^[1]
Plough in use.
5.9 kiloyear event, one of the most intense aridification events during the Holocene. It ended the Neolithic Subpluvial and likely initiated the most recent desiccation of the Sahara desert, triggering migration to river valleys, such as from central North Africa to the Nile valley.

↑ "The Somerset Levels (the oldest timber trackway discovered in Northern Europe)". Current Archaeology 172. Current Archaeology. February 2001. Archived from the original on 2007-03-11. Retrieved 2007-03-25.

39th century BC
41st century BC←40th century BC← ↔ →38th century BC→37th century BC