French doctors performed the first zero-gravity surgery on Wednesday inside an aircraft specially rigged for the occasion.
They removed a tumor from a 46-year-old volunteer in preparation for extraterrestrial living to show it should be safe to operate on patients in space.
In October 2003, surgeons mended a 0.5-millimetre-wide artery in a rat's tail in zero gravity. Next up is remote-controlled zero-gravity robot surgery.