The stone Copan Stela 11 is shown at the Maya 2012: Lords of Time exhibit at the University of Pennsylvania Museum of Archaeology and Anthropology Thursday, May 3, 2012, in Philadelphia. The exhibit is scheduled to open May 5. (AP Photo/Matt Rourke)
A jade figurine of Maize God is shown at the Maya 2012: Lords of Time exhibit at the University of Pennsylvania Museum of Archaeology and Anthropology Thursday, May 3, 2012, in Philadelphia. The exhibit is scheduled to open May 5. (AP Photo/Matt Rourke)
A ceramic Censer Lid with Founder Portrait is shown at the Maya 2012: Lords of Time exhibit at the University of Pennsylvania Museum of Archaeology and Anthropology Thursday, May 3, 2012, in Philadelphia. The exhibit is scheduled to open May 5. (AP Photo/Matt Rourke)
The stone Copan Stela 11 is shown at the Maya 2012: Lords of Time exhibit at the University of Pennsylvania Museum of Archaeology and Anthropology Thursday, May 3, 2012, in Philadelphia. The exhibit is scheduled to open May 5. (AP Photo/Matt Rourke)
A display with scenes of destruction is shown at the exhibit Maya 2012: Lords of Time at the University of Pennsylvania Museum of Archaeology and Anthropology Wednesday, April 25, 2012, in Philadelphia. The exhibit is scheduled to open May 5. (AP Photo/Matt Rourke)
Shown is the exhibit Maya 2012: Lords of Time at the University of Pennsylvania Museum of Archaeology and Anthropology Wednesday, April 25, 2012, in Philadelphia. The exhibit is scheduled to open May 5. (AP Photo/Matt Rourke)