Maximum Habitable G?? Hi, read on the net about the detection of a 5 * Earth Mass planet today orbiting around Gliese 581, and this got me thinking about the titled question which I have been unable to answer for myself. What is the maximum 'g' (gravitational acceleration) that a human being can live at? I was thinking in the context of settling other worlds, by 'live' I think some reduction in quality of life at higher g would be acceptable ie. reduced lifespan, reduced walking distance etc. but the 'guinea pigs' would have to be able to live and colonise said planet. Oh also no fancy high-tech aid's to raise the figure, maybe with the possible exception of walking stick's, zimmerframes, and maybe the use of wheelchairs. Thanks!