Cosmic rays and lasers have revealed that deep underneath the city streets of Naples, Italy, lie the remains of the Greeks who originally settled the area, as well as the catacombs of Christians who lived there during the Roman era nearly two millennia ago, a new study finds.
Researchers have long known that ancient Greek burials were hidden beneath the city, but weren't able to access all of them. Now, these cutting-edge techniques have enabled researchers to peer into the earth without any digging.
