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.
During the Ordovician Period, the surface of the earth was dramatically different than it is today. Nearly all life on earth was in the oceans. The only land life was in the form of very primitive plants very near the water line of the coasts, probably mosses and algae and were of a non-vascular nature.y the end of the Ordovician Period, primitive jawless fish called Ostracoderms appeared. These primitive fish were covered with bony plates and were among the first vertebrates on the earth.