32 What's the most logical shape for my city in space (space station)? 2014-11-23T02:10:36.970

18 Volume-efficient team sports for a narrow environment 2015-03-09T04:30:53.777

16 How many people would be needed to operate a space hotel? 2014-11-22T20:19:22.390

14 Space station mass per person 2014-11-21T13:58:09.277

13 Where should I place my city in space? 2015-02-12T16:37:46.700

11 Overpopulation . . . IN SPACE! 2015-07-28T11:51:47.437

7 Asteroid Mining as an Economy? 2015-05-26T05:21:15.250

6 Which materials in a space station could be replaced with carbon compounds, and which not? 2015-08-12T18:14:25.517

6 How powerful does an orbital laser cannon need to be? 2015-09-03T14:51:43.343

3 How to ensure a fresh food supply on a space station? 2015-06-01T13:50:16.993

-1 Forced re-entry of all man-made satellites in short moment notice 2015-07-10T02:53:31.117