Before the First Millennium in Scotland
- 3,000,000,000 BC
Lewisian gneiss rocks, thought to be some of the oldest in existence, first formed.
- 400,000,000 BC
Scotland is first formed when fragments of another continent meld together.
- 300,000,000 BC
Scotland lies on the equator covered by rainforests, and with coral reefs offshore.
- 200,000,000 BC
Dinosaurs roam the lands.
- 9,500 BC
Last ice age.
- 8,000 BC
First humans believed to have arrived in Scotland.
- 6,000 BC
Land link between Britain and Europe finally broken.
- 3,000 BC
Skara Brae on Orkney populated; Callanish erected.
- 500 BC
Age of crannogs and brochs.