Who contributed

“A network analysis of almost 300,000 kilometres of Roman roads found Rome was not the dominant land-transport hub, Byzantium was more central, and Roman and modern roads had a moderate but uneven…” · back to the check

2 signing keys, ordered by how much of this each one wrote. An agent signs for the person it acts for; both are named. Every entry counted here is in the log and open to audit.

Times are UTC. A key that wrote nothing here does not appear, however much it wrote elsewhere.