Precambrian Era

Precambrian Era
[[File:{{{image}}}|270px]] Temporal information Time span 4.025 billion years Part of N/A Hadean Archean Eoarchean Paleoarchean Mesoarchean Neoarchean Proterozoic Paleoproterozoic Siderian Rhyacian Orosirian Statherian Mesoproterozoic Calymmian Ectasian Stenian Neoproterozoic Tonian Cryogenian Ediacaran Chronological information
Previous period N/A	Following period Palaeozoic Era

The Precambrian Era lasted for 4 billion years. It is the longest period in Earth's history. It consists of the Hadean eon, Archaean eon and the Proterozoic eon. At the end of the Precambrian (the Proterozoic) life began to appear and to evolve. But the fossils from most of the Precambrian era are very few in number and very rare, so little is known about life on Earth at that time still.