What have we learned so far in the preparation for evolution? – Age of the earth – evidnece shows us the earth is at about 4.5 billion years old. Grand cayon -6 millions years old from erosion Continetal drift – 200 millions years – the rate at which the continents spread would put them together 200 million years ago. Magnetic pole flip Radiometric dating. – the oldest rocks we find are 3.5 billions years old. But the minerals in the rocks are 4.4 billions years old.