A major find of an ancient Mayan painting changes what we know about the history of Mayan culture. “The find, a 30-by-3-foot mural in vivid colors depicting the ancient culture’s mythology of creation and kingship, is the centerpiece of a larger mural, parts of which were first discovered and exposed in Guatemala four years ago. New radiocarbon tests revealed the painting to be 200 years older than originally estimated, dating to about 100 B.C.”