Is there a bona fide scientific challenge to the age of the Earth, which is measured to be 4.5 billion years old? As an old-earth creationist (OEC), I would answer no. But, there has been one scientific argument for a young Earth that has given me some pause for thought: the discovery of soft tissue remnants in the fossilized remains of dinosaurs (and other organisms). Paleontologists have discovered the remnants of blood vessels, red blood cells, bone cells, and protein fragments, such as collagen and keratin, in the fossilized remains of dinosaurs that age-date older than 65 million years.