Nielson-Marsh, Christina, et al., “Biomolecules in fossil remains: Multidisciplinary approach to endurance,” The Biochemist, 12-14, June 2002
Last year, researchers estimated that the half-life of DNA — the point at which half the bonds in a DNA molecule are decayed as 521 years. ”http://mathcentral.uregina.ca/beyond/articles/ExpDecay/Carbon14.html
The half-life of DNA is shorter than even Carbon 14 (half life of 5,730 years- 10 times longer than DNA) which is only considered valid on samples up to about 50,000 years old. Apply this to DNA with a half life of 521 years and DNA decay should be valid only for samples of about 5,000 years as a maximum!
Any article or scientific claim regarding the discovery of DNA in any fossil or sample indicates scientifically that the sample is less than 125,000 years old and such a claim is FALSE.
In light of the observable half-life of DNA decay, any conclusion regarding fossils (or any sample) which contains DNA and is also purported as also being greater a few thousand years old as factually invalid.
DNA delays at a known rate, therefore such time limits renders conclusions that both the sedimentary layers and the fossils within them are (as a maximum) 125,000 years old. Finally, because decay rates are observable in the present and rock layers which contain the fossils are not observable– the dating should be ruled by the half-life of DNA and not based on evolutionary time scales of millions of years.
Therefore these claims below (and many, many others) are falsified and debunked as “ancient” DNA:
(Mary Schweitzer’s) papers have the potential to transform dinosaur paleontology into a molecular science, much as analyzing ancient DNA has revolutionized the study of human evolution.”https://www.sciencemag.org/news/2017/01/scientists-retrieve-80-million-year-old-dinosaur-protein-milestone-paper