This year marks 100 years since the birth of the Soviet Union. How have countries in and near Europe aligned themselves over the last century?
How have the world's largest economies changed over time? These graphics show countries sized by their GDP, as a share of the global total.
These historical maps tell the story of the USSR, and how its territorial expansion and contraction is linked to present day geopolitical events.
This intense animation plots data on nearly 70 years of arms sales, to compare the influence of the two superpowers from the Cold War to modern...