1. DNA in ‘ancient’ fossils. DNA extracted from bacteria that are supposed to be 425 million years old brings into question that age, because DNA could not last more than thousands of years.
2. Lazarus bacteria—bacteria revived from salt inclusions supposedly 250 million years old, suggest the salt is not millions of years old. See also Salty saga.
3. The decay in the human genome due to multiple slightly harmful mutations each generation is consistent with an origin several thousand years ago. Sanford, J., Genetic entropy and the mystery of the genome, Ivan Press, 2005; see review of the book and the interview with the author in Creation 30(4):45–47, September 2008. This has been confirmed by realistic modelling of population genetics, which shows that genomes are young, in the order of thousands of years. See Sanford, J., Baumgardner, J., Brewer, W., Gibson, P. and Remine, W., Mendel’s Accountant: A biologically realistic forward-time population genetics program, SCPE 8(2):147–165, 2007.
4. The data for ‘mitochondrial Eve’ are consistent with a common origin of all humans several thousand years ago.
5. Very limited variation in the DNA sequence on the human Y-chromosome around the world is consistent with a recent origin of mankind, thousands not millions of years.
Many fossil bones ‘dated’ at many millions of years old are hardly mineralized, if at all. This contradicts the widely believed old age of the earth. See, for example, Dinosaur bones just how old are they really? Tubes of marine worms, ‘dated’ at 550 million years old, that are soft and flexible and apparently composed of the original organic compounds hold the record (original paper).
6. Dinosaur blood cells, blood vessels, proteins (hemoglobin, osteocalcin, collagen, histones) and DNA are not consistent with their supposed more than 65-million-year age, but make more sense if the remains are thousands of years old (at most).