It looks like NASA is looking again at using the inflatable module technology that it first proposed as “TransHab” in the 1990s. on the International Space Station. (top pic)

Bigelo Aerospace has been working with the concept, and NASA’s basic technology, to develop a tourist destination in orbit (bottom Pic), and it has successfully launched two prototypes populated with insects, and with this success, NASA is again considering adding an inflatable module to the ISS.

The concept was originally developed to provide for living quarters for a manned Mars Mission.