Have you ever wondered how long it took to cross the Roman Empire? No, well Orbis tells you anyway!

Orbis is The Stanford Geospatial Network Model of the Roman World, and it reconstructs the time cost and financial expense associated with a wide range of different types of travel in antiquity. You can either use it as a fun party trick, or delve into the data and the research behind it. Either way, this is vulgarisation at its finest.