ancient Rome

Computer experts unveiled a digital reproduction of ancient Rome that simulates the ancient city over a span of several centuries.The simulation allows visitors to crawl through the bowels of the Colosseum, lined with lion cages, and fly up to circle the bas-reliefs and inscriptions on top of its arches at a time when the building was untouched by time.It cost more than $2 million US and took 10 years to create the digital model, said Bernard Frischer of the University of Virginia, who led the project.