There has been much controvery recently about petroglyghs that are found in a canyon in Kachina Bridge National Monument, the most famous of which depicts a sauropod dinosaur . Many people are saying it is simply a snake drawing with mud stains, but closer inspection of the facts shows this is not so.
The sceptics' evidence for the sauropod carving being a muddy snake is extremely flimsy. In fact, they never did any actual tests on the carving. In reality, all they did was look closely at it. With their "trained" minds already set on the "fact" that no human has ever seen a live dinosaur, it was easy for their "trained" eyes to see anything but a sauropod dinosaur.