Can bones and teeth be identified by DNA? Do bones and teeth contain DNA?

There are many kinds of cells, including bone cells.

Of course, cells contain DNA (nucleic acid)

But generally speaking, the radioactive element of carbon 14 is used to identify the age of bones and teeth.

But the fossils of tens of thousands of years ago cannot be identified by DNA, because nucleic acids are biological macromolecules and have long since disappeared.

Fossil is a radioactive element, carbon 14, dating.

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