Answer:
The rock layers help by preserving the fossils and it also keeps a record of how they died, where they lived, what they ate, and a million other factors. Most rock layers are trillions of years old and it shows us what was alive and how they lived and what the earth was like back then.
Explanation:
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Answer:</h2>
the measured abundances of elements, the observed expansion of space, and the discovery of the cosmic microwave background 'CMB'. The CMB refers to the uniform distribution of radiation that pervades the entire universe.
