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Topic	Forum	Replies	Last post
31 Town Cooking using Stored Heat by Calliban	Science, Technology, and Astronomy	4	2024-04-26 10:02:20 by Calliban
32 Artificial blackholes by Calliban	Science, Technology, and Astronomy	1	2024-04-23 10:38:24 by tahanson43206
33 Cast Iron / Cast Steel Architecture by Calliban	Science, Technology, and Astronomy	8	2024-04-14 19:42:15 by tahanson43206
34 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
35 Nuclear Powered Construction Equipment by Calliban	Planetary transportation	2	2024-04-06 01:21:51 by Mars_B4_Moon
36 Poundbury by Calliban	Life support systems	1	2024-02-21 07:09:19 by tahanson43206
37 Rocket Launch Assist: Compressed Air, Liquid Air and Steam by Calliban	Science, Technology, and Astronomy	5	2024-02-16 11:17:03 by Terraformer
38 Alpha Particles Propulsion by Calliban	Science, Technology, and Astronomy	2	2024-02-09 09:31:27 by Calliban
39 Large Ship propulsion - Resistojet by Calliban	Interplanetary transportation	6	2024-01-20 08:11:24 by SpaceNut
40 Regolith Dust as Propellant for Large Ship by Calliban	Interplanetary transportation	1	2024-01-09 08:59:29 by tahanson43206
41 Technetium by Calliban	Life support systems	2	2024-01-06 18:53:45 by Calliban
42 Going Amish: Non-Electrical Power by Calliban	Science, Technology, and Astronomy	3	2024-01-03 18:45:40 by SpaceNut
43 Subsurface dry ice and liquid CO2 by Calliban	Exploration to Settlement Creation	5	2023-12-19 16:01:22 by Calliban
44 Direct Renewable Energy by Calliban	Science, Technology, and Astronomy	3	2023-12-05 17:07:34 by GW Johnson
45 Geology, Mars, Earth and Elsewhere by Calliban	Science, Technology, and Astronomy	3	2023-11-30 20:36:02 by SpaceNut
46 Cold CO2 powered vehicles by Calliban	Planetary transportation	13	2023-11-30 19:52:44 by SpaceNut
47 Velomobiles by Calliban [ 1 2 ]	Science, Technology, and Astronomy	25	2023-11-25 18:12:54 by Mars_B4_Moon
48 The Return of the Airship by Calliban	Science, Technology, and Astronomy	4	2023-10-26 20:11:55 by tahanson43206
49 Mars has fewer minerals than Earth by Calliban	Science, Technology, and Astronomy	5	2023-10-23 11:04:20 by Calliban
50 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
51 Hovercraft on Mars by Calliban	Planetary transportation	23	2023-09-10 10:44:40 by tahanson43206
52 Flash Pyrolysis by Calliban	Science, Technology, and Astronomy	8	2023-06-05 17:49:33 by Calliban
53 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
54 Low-cost nuclear reactors by Calliban [ 1 2 ]	Martian Politics and Economy	38	2023-03-20 10:52:40 by Mars_B4_Moon
55 Ceramic habs / pressure vessels by Calliban	Life support systems	4	2023-03-06 10:15:21 by Mars_B4_Moon
56 Cryogenic heat engines by Calliban	Science, Technology, and Astronomy	11	2023-02-17 07:11:25 by tahanson43206
57 Compressed gas balloon rocket for Mars launch by Calliban [ 1 2 3 ]	Interplanetary transportation	69	2022-10-22 16:56:32 by SpaceNut
58 Renewables without (or with minimal) Storage by Calliban	Science, Technology, and Astronomy	4	2022-10-16 17:00:46 by SpaceNut
59 Car-free cities? by Calliban	Science, Technology, and Astronomy	10	2022-09-10 15:53:18 by SpaceNut
60 Is the world doomed to economic collapse by Calliban [ 1 2 3 4 ]	Science, Technology, and Astronomy	76	2022-09-02 04:41:37 by Mars_B4_Moon

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