It took many years of evolution for complex, multi-celled organisms to develop. Single celled organisms were the first that were around to be fossilized.
According to the fossil record, the earliest cells lived about 3.5 billion years ago.
The earliest primate identifiable from the fossil record is believed to be a group of creatures called Plesiadapiforms. These small mammals lived around 65 million years ago and are thought to be ancestral to modern primates.
The oldest fossil evidence is from single-celled organisms such as bacteria and archaea. These microorganisms have been found in rocks dating back over 3.5 billion years, providing some of the earliest known evidence of life on Earth.
As groups, ammonoids and nautiloids have extensive fossil records. The earliest fossil ammonoids date back to the late Silurian, and the earliest nautiloids date back to either the beginning of the Ordovician, or the very end of the Cambrian.
The earliest record of mammals comes from sedimentary rock. Sedimentary rocks are deposited in layers. They are an important source of natural resources, such as coal, fossil fuel, and ore.
The answer is the fossil record :D
The name of that thing was the "kevin". He is very rare and is only found in the equator.
The fossil record organizes fos- sils by their estimated ages and physical similarities.
The fossil record organizes fos- sils by their estimated ages and physical similarities.
The fossil record suggests that the earliest known bird capable of powered flight was Archaeopteryx, which lived around 150 million years ago during the late Jurassic period. This indicates that birds began to fly during the Mesozoic Era.
The age of the oldest fossil on record is about 3.5 billion years old.
The chiniese