"Operating on the planet's surface would also be a first for Russia’s space agency, Roscosmos, which is a partner in the mission — and which plans to partake in future joint Europe–Russia missions, including a 2020 rover landing on Mars. The Soviet Union came close to success in 1971 with the Mars 3 probe, which failed just 20 seconds after landing on the surface."
First I was excited to become aware of a new human artifact landing on Mars today - but now I'm even more fascinated by how things could've turned out if the Russians had managed to boogie around in an rc car on Mars three decades ahead of NASA...