A Russian rocket company has announced that it's working on a space taxi that'll shuttle crews from the ISS down to the moon. The plans were announced at an international conference on space exploration just outside Moscow and reported by Russia Today. The craft, provisionally named Ryvok, would be permanently docked on the ISS -- or its replacement -- transporting cargo and crews to the lunar surface. Each flight would be powered by fuel in an "accelerator block," brought up from Earth on the back of a Russian rocket. The report explains that it's likely to be the Angara A5, a heavy-lift vehicle that's intended to replace the trusty old Soyuz.