What is the meaning of "high-fidelity" in the following context?
Over millions of years in the fossil record, hominin teeth preserve a high-fidelity record of their own growth, development, wear, chemistry and pathology. They yield insights into human evolution that are difficult, if not impossible, to achieve through other sources of fossil or archaeological data. (Source)
I know the meaning of high-fidelity as it is used in stereophonic businesses. It means highly similar to the real sound. But in the above text, I cannot figure out its meaning.