What do you think about these ancient artifacts and petroglyphs?

In Cambodia. Is that a stegosaurus?

A piece of a beautiful mosaic that was one of the wonders of the second century world. Called the Nile Mosaic of Palestrina, it depicts Nile scenes from Egypt all the way to Ethiopia.The Greek Letters above the reptilian animal in question are: KROKODILOPARDALIS which is literally translated Crocodile-Leopard:
This picture was drawn by North American Indians that lived in the area that has now become Natural Bridges National Monument in the western United States:
A similar petroglyph was been found in Arizona’s Havasupai Canyon:
There are stories of a plesiosaur-like creature seen in Queensland, Australia. Both aboriginal peoples around Lake Galilee and tribes farther up to the north tell of a long-necked animal with a large body and flippers:
The art below is from an Mesopotamian cylinder seal dated at 3300 BC:
The January 2003 issue of National Geographic magazine presents an artifact described as a “cosmetic palette . . . from a cemetery of the first dynasties in Manshaat Ezzat.”
A slate palette from Hierakonpolis showing the triumph of King Nar-mer:
The dragons that every culture from every corner of the globe talk about, know what I’m saaaayin’?
The petroglyphs are touted as the real deal, as the “glaze” over them was put there from the natural weathering.