Read this excerpt from "DNA Testing."DNA samples from insects preserved in amber can date back to before the time of the dinosaurs, which died out 65 million years ago. George Poinar of Oregon State University, for example, has even extracted muscle tissue from a 125-million-year-old Lebanese weevil. This is, says Poinar, "the best preserved protein on the face of the earth." So far, DNA has been successfully extracted from about a half dozen ancient samples in amber. Select the most accurate summary of Kaku's argument.

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