Not that weâd expect less after the cliffhanger last season. If you havenât yet watched the September 23rd premiere of Chicago Fire, and somehow have managed not to find out who died, donât keep reading. If you have, please join me in my misery.
The Precambrian Super-Eon lasted from the formation of Earth 4,567 million years ago until the start of the Pharerozoic Eon 542 million years ago. It lasted 4.025 billion years. 90% of Earth's history.
Setting The Stage for Complex Life. The Precambrian is the first time period of the earth. The earth took form about 4.5 billion years ago. For the first 4 billion years of that time, the Earth was growing and changing. The only living things during this time were one-celled organisms.