The European Space Agency has signed an agreement with the Russian agency Roscosmos to work on a joint mission to Mars.
The ExoMars programme would lead to the launch of two missions in 2016 and 2018.
Under the agreement, the ESA will provide the Trace Gas Orbiter and the Entry, Descent and Landing Demonstrator Module components for the 2016 launch, and the carrier and rover technology for the later project. Its Russian partners will be responsible for the 2018 descent module and surface platform, and will provide launchers for both missions.