WASHINGTON (AP) — As the saying went, all roads once led to Rome — and those roads stretched 50% longer than previously known, according to a new digital atlas published Thursday.The last major atlas of ancient Roman road networks was published 25 years ago. Since then, advances in technology and other newly accessible sources have greatly expanded researchers’ ability to locate ancient roadways.Over five years, a team of archaeologists combed through historical records, ancient journals, locations of milestones and other archival data. Scientists then looked for clues in satellite imagery and aerial photography, including recently digitized photos taken from planes during World War II.AdvertisementAdvertisementAdvertisementAdvertisementWhen ancient accounts hinted at lost roads in a certain area, researchers analyzed the terrain from above to spot subtle traces — things like faint differences in vegetation, soil variations or shifts in elevation, as well as traces of ancient engineering like raised mounds or cut hillsides — that revealed where Roman lanes once ran.“It becomes a massive game of connecting the dots on a continental scale,” said Tom Brughmans, an archaeologist and co-author of the study published in Scientific Data.The data and an interactive digital map are also available online for scholars, history teachers or anyone with an interest in ancient Roman history.Earlier research had focused on “the highways of the Roman Empire” — the large thoroughfares most often mentioned in familiar historical accounts, said Brughmans.AdvertisementAdvertisementAdvertisementAdvertisementThe updated map fills in more obscure details about “secondary roads, like the country lanes, that connected villas and farms” and other locations, said Brughmans, who’s based at Aarhus University in Denmark.Researchers previously tallied the extent of Roman roads as covering around 117,163 miles (188,555 kilometers). The new work shows nearly 186,000 miles (300,000 kilometers) of roads across the extent of the Roman Empire, allowing travel from Spain to Syria.The study added a lot to archaeologists’ knowledge of ancient roads in North Africa, the plains of France and in the Peloponnese peninsula of Greece.“This will be a very foundational work for a lot of other research,” said archaeologist Benjamin Ducke of the German Archaeological Institute in Berlin, who was not involved in the project.AdvertisementAdvertisementAdvertisementAdvertisementBut one caveat, he said, is that it’s still not clear if all the roads were ever open and active at the same time.More in ScienceBeing able to visualize the ancient routes that Roman fa …
