Create your own foam head cutout with any photo in minutes at the lowest cost. Ships tomorrow. No extra fees. Done in minutes with the click of a button. Choose your photo and we will make it within a 18Ã24 size on quality foam board and water resistant vinyl, whichever is tallest or widest for your cutout big head.
Precambrian time includes Earth's history from birth up to 590 million years ago. That is, the Precambrian spans 90% of Earth's existence. Fossilized bacteria and blue-green algae show that primitive life existed at least 3,500 million years ago, and possibly earlier.
Best Answer: Geological Period that lasted the longest: The Precambrian Era The Precambrian Era is the longest geological era beginning 4.5 billion years ago and lasting approximately 4 billion years. The Precambrian era is generally separated into two eons the first of which being the Archaean Eon. spanning from around 4.5 billion years ago to 2.5 billion years ago, during this time air temperatures lowered and the water vapour condensed forming the first primeval oceans.