In Cambodia, At Ta Prohm, near Angkor Wat, and built by the epic builder king Jayavarman VII in the late 1100s, a small carving on a crumbling temple wall seems to show a dinosaur - a stegosaurus, to be exact. The hand-sized carving can be found in a quiet corner of the complex, a stone temple engulfed in jungle vegetation where the roots of centuries-old banyan trees snake through broken walls.