I've used the Phoenix Centrifuge to replicate what the body's going to go through on the flight up. I've also done some gravity tests with ZERO-G [a charter-flight service in Arlington, Va., that uses modified Boeing 727s to simulate weightlessness], which went great.
Richard BransonNever go into business purely to make money. If that's the motive you're better off doing nothing.
Richard BransonI think entrepreneurship is our natural state--a big adult word that probably boils down to something much more obvious like playfulness.
Richard Branson