Millions could see their first snowfall of the season this weekend as cold air brings the threat of snow to 13 states.

The Roman Empire had an impressive road network. A new dataset now visualizes the road map, adding over 100,000 kilometers of previously unknown routes.

Archaeologists have compiled the most detailed map yet of roads throughout the Roman Empire in AD 150, totalling almost 300,000 kilometres in length

A high-resolution digital map allows people to plan their routes along the ancient roads of the Roman Empire. Combining historical records with modern mapping techniques, researchers mapped hundreds of thousands of kilometres of roads. The findings nearly double the known length of Roman roads.

If you were up around 1 a.m. ET Thursday, you may have seen the northern lights when activity was high. But through the day Thursday, you shouldn’t expect to see any aurora, thanks to the sun drowning them out.

The person who helped draw the new congressional map in California, data consultant Paul Mitchell, joins Elex Michaelson in Sacramento to speak following the big win of the Democrats.