Back in 1996, it was determined that original blood vessels, proteins, as well as other biological material was preserved inside dinosaur bones. This suggested that these bones were not 90 million years old since the half-life for these biomolecules is, at max, about 1 million years. Incredibly, scientists have now found original dinosaur DNA and chromosomes!
This is immensely important from a creationist perspective because the half-life of DNA is about an order of magnitude less than that of proteins. Quite simply, DNA should NOT be found in ancient dinosaur fossils.
It is true, the entire genome was not found, but they did find an intact double strand complete with 6, in-situ, base pairs: “This not only supports that the compound within these cells is chemically consistent with DNA, but that material is double stranded, and of a minimum length of 6 base pairs.”
Just as astounding was the amazing micrographs that show dinosaur chromosomes lining up at the center of the cell during metaphase of cell replication (although authors think it may represent a programmed cell death phase).
This is one piece of evidence that really does suggest a very young biosphere.
As a precaution, keep in mind that there are still numerous other processes that seem to imply great lengths of time—radioisotope decay is a prime example. Nevertheless, this is an exciting find for young-earth creationists.