Marc Rayman says Vesta appears to have a layered structure, one that is similar to planets like Earth, Mars and Venus.

VOA: special.2011.07.27

Only since the nineteen-sixties have scientists begun to understand that the Earth is a great, living structure.

VOA: special.2010.01.12

Coral reefs are home to 25 percent of the world's marine fish species, and cover 1 percent of the Earth's surface, making them the largest single living structure on Earth.

CNN: All About: Coral Reefs

This information should give scientists fresh insight into the internal structure of Earth's satellite.

BBC: Nasa reveals new information about moon probes crash sites

An inflatable structure would be transported from Earth, then covered with a shell built by 3D printers.

BBC: 3D printed moon building designs revealed