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Topic	Forum	Replies	Last post
31 Orbital Rings by Calliban	Science, Technology, and Astronomy	2	2024-05-17 06:59:49 by Mars_B4_Moon
32 Water on Mercury? by Calliban	Science, Technology, and Astronomy	15	2024-05-17 04:03:16 by Mars_B4_Moon
33 Nuclear power is safe by Calliban [ 1 2 3 … 26 ]	Science, Technology, and Astronomy	626	2024-05-03 07:36:37 by Mars_B4_Moon
34 Town Cooking using Stored Heat by Calliban	Science, Technology, and Astronomy	4	2024-04-26 10:02:20 by Calliban
35 Artificial blackholes by Calliban	Science, Technology, and Astronomy	1	2024-04-23 10:38:24 by tahanson43206
36 Cast Iron / Cast Steel Architecture by Calliban	Science, Technology, and Astronomy	8	2024-04-14 19:42:15 by tahanson43206
37 Energy Return on Energy Invested for Solar PV by Calliban [ 1 2 3 ]	Science, Technology, and Astronomy	69	2024-04-12 17:29:29 by tahanson43206
38 Nuclear Powered Construction Equipment by Calliban	Planetary transportation	2	2024-04-06 01:21:51 by Mars_B4_Moon
39 Poundbury by Calliban	Life support systems	1	2024-02-21 07:09:19 by tahanson43206
40 Rocket Launch Assist: Compressed Air, Liquid Air and Steam by Calliban	Science, Technology, and Astronomy	5	2024-02-16 11:17:03 by Terraformer
41 Alpha Particles Propulsion by Calliban	Science, Technology, and Astronomy	2	2024-02-09 09:31:27 by Calliban
42 Large Ship propulsion - Resistojet by Calliban	Interplanetary transportation	6	2024-01-20 08:11:24 by SpaceNut
43 Regolith Dust as Propellant for Large Ship by Calliban	Interplanetary transportation	1	2024-01-09 08:59:29 by tahanson43206
44 Technetium by Calliban	Life support systems	2	2024-01-06 18:53:45 by Calliban
45 Going Amish: Non-Electrical Power by Calliban	Science, Technology, and Astronomy	3	2024-01-03 18:45:40 by SpaceNut
46 Subsurface dry ice and liquid CO2 by Calliban	Exploration to Settlement Creation	5	2023-12-19 16:01:22 by Calliban
47 Direct Renewable Energy by Calliban	Science, Technology, and Astronomy	3	2023-12-05 17:07:34 by GW Johnson
48 Geology, Mars, Earth and Elsewhere by Calliban	Science, Technology, and Astronomy	3	2023-11-30 20:36:02 by SpaceNut
49 Sticky: Cold CO2 powered vehicles by Calliban	Planetary transportation	13	2023-11-30 19:52:44 by SpaceNut
50 Velomobiles by Calliban [ 1 2 ]	Science, Technology, and Astronomy	25	2023-11-25 18:12:54 by Mars_B4_Moon
51 The Return of the Airship by Calliban	Science, Technology, and Astronomy	4	2023-10-26 20:11:55 by tahanson43206
52 Mars has fewer minerals than Earth by Calliban	Science, Technology, and Astronomy	5	2023-10-23 11:04:20 by Calliban
53 Is it time to reverse devolution in the UK? by Calliban	Not So Free Chat	10	2023-10-09 19:39:35 by Mars_B4_Moon
54 Hovercraft on Mars by Calliban	Planetary transportation	23	2023-09-10 10:44:40 by tahanson43206
55 Flash Pyrolysis by Calliban	Science, Technology, and Astronomy	8	2023-06-05 17:49:33 by Calliban
56 Heat your House for Free with an LP Air Compressor by Calliban [ 1 2 ]	Home improvements	25	2023-03-28 19:25:05 by SpaceNut
57 Low-cost nuclear reactors by Calliban [ 1 2 ]	Martian Politics and Economy	38	2023-03-20 10:52:40 by Mars_B4_Moon
58 Ceramic habs / pressure vessels by Calliban	Life support systems	4	2023-03-06 10:15:21 by Mars_B4_Moon
59 Cryogenic heat engines by Calliban	Science, Technology, and Astronomy	11	2023-02-17 07:11:25 by tahanson43206
60 Compressed gas balloon rocket for Mars launch by Calliban [ 1 2 3 ]	Interplanetary transportation	69	2022-10-22 16:56:32 by SpaceNut

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