Chemical Evolution and The First Cells. Big Bang?. Earth is approx. 4.6 billion years old Formed as a result of the Big Bang which resulted in formation of universe approx. 15 bya NOTE: Currently the Big Bang theory is being challenged by physicists such as Stephen Hawkings. Early Earth.
Chemical Evolution and The First Cells
How did life 1st form?
2 theories regarding formation of organic molecules
DNA RNA protein