The oldest micro fossils are comprised of carbon. This is because they have been in the ground a very long time and it compresses the materials into carbon.
Stromatolites.
The oldest known fossils are prokaryotic. These fossils, dating back over 3.5 billion years, are believed to be ancient bacteria and archaea. Eukaryotic cells are thought to have evolved later.
The fossils of the oldest life forms can be found in the Precambrian period of the fossil record.
The oldest humanoid fossils were all found in Africa.
The oldest known fossils are up to 3.5 billion years old.
Africa
The 4th layer of soil >.<
Microcosm
a dinosaurs tooth
3.5 billion years
fish with no jaw........novanet
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