P phillip1882 Prince Supporter Joined Jul 24, 2007 Messages 423 Apr 30, 2024 #62 finished refrigeration Last edited: Apr 30, 2024
P phillip1882 Prince Supporter Joined Jul 24, 2007 Messages 423 Apr 30, 2024 #63 100 million, industrialism
P phillip1882 Prince Supporter Joined Jul 24, 2007 Messages 423 Apr 30, 2024 #66 finished rocketry and radio
P phillip1882 Prince Supporter Joined Jul 24, 2007 Messages 423 Apr 30, 2024 #71 finished satellite 200 million
P phillip1882 Prince Supporter Joined Jul 24, 2007 Messages 423 May 1, 2024 #74 finished super conductors
P phillip1882 Prince Supporter Joined Jul 24, 2007 Messages 423 May 1, 2024 #77 finished fiber optics