DNA Decays Fast

DNA experts insist that DNA cannot exist in nature longer than 17,500 years at +10 C (125,000 years at 0 C), yet intact strands of DNA have been recovered from fossils allegedly much older: Neanderthal bones (supposedly 50,000-100,000 years old), insects in amber (supposedly 120-135 million years old), and "Lazarus" bacteria (supposedly 250 million years old).