Ancient images that creationists claim are evidence of humans living alongside dinosaurs are at best just smeared pictures, scientists find.

At the site of Kachina Bridge in Utah — an immense sandstone formation resembling an arch more than 200 feet (60 meters) high and wide that was formed by the undercutting of a rock wall by flowing water  — prehistoric cultures decorated the  walls with paintings and engravings known as petroglyphs. Among them are what young-earth Earth creationists, who believe all life was created on the same day about 6,000 years ago, have said are depictions of dinosaurs, claiming these images as proof of their beliefs. [Scientists Hunt for Signs of Earth's Earliest Life]