Following the decision by NASA to retire the Space Shuttle in 2011, the ESA decided to launch a further series of studies to determine the potential for evolutions and adaptations of the ATV. As a result of these studies, the cargo return version (CARV) was identified as a particularly promising candidate for further development. The goal of this variant is to provide ESA with the capability to transport scientific data and cargo from the ISS to Earth. Beyond this, CARV could be enhanced to become a crew vehicle which would be launched by an adapted Ariane 5.