The US and Russia will work together on a NASA-led project to build the first lunar space station.
It is part of a long-term project to send humans to Mars.
NASA said the project envisages building a crew-tended spaceport in lunar orbit that would serve as a “gateway to deep space and the lunar surface”.
Russian space agency Roscosmos announced a cooperation agreement had been signed at an astronautical congress in Adelaide. Read more