Paleontologists went digging for T-Rex dinosaur bones in Montana. In order to transport the bone, they had to break the bone in half. Out spilled bloody soft tissue.
At the time this happened, absolutely no one thought soft tissue could survive millions of years. The uniformitarian assumption had always been, based on human experience with dead tissue, that the soft tissue would decompose in a matter of a few decades at most.
After the discovery of soft, bloody dinosaur tissue, did scientists begin to acknowledge that the earth might be young? Of course not. The world view assumption that the earth is millions of years old was never going to be reconsidered. Instead, everyone changed their assumption that bloody soft tissue couldn’t survive deep time. Of course soft tissue lasts millions of years! Happens all the time!
It was a matter of time before a rescuing device was proposed and adopted: The presence of iron. The problem is the amount of iron available was far too little to create the effects they needed.
https://www.smithsonianmag.com/science-nature/dinosaur-shocker-115306469