- A thread explored building large, tow-able ocean habitats by freezing seawater into insulated ice structures, debating whether to start with an existing iceberg or grow a custom “snail-shell” spiral of ice using solar-powered CO₂ or propane refrigeration lines and periodically pumping out brine.  
- Mechanical limits were discussed: 400 m-thick icebergs already experience ~40 bar pressure, and wave forces may exceed the tensile strength of solid ice; alternative hexagonal barrel platforms that harvest wave energy as compressed air were mentioned from the Living Universe Foundation archives.  
- Rheinmetall’s new mobile “smart factory” for battlefield 3-D printing of spare parts was shared as a link, illustrating rapid-deployment additive manufacturing in military logistics.  
- Carl Feynman tweeted about 1980s work by Philip Morrison on the complex decay chains of fission products in reactors, noting that the final stable mixture is hard to predict because intermediate isotopes interact; the tweet was flagged as likely authentic.  
- A side discussion on historical technological latency argued that lasers could have been built decades before 1958 once neon tubes (1898) existed, and that fluidic digital computers using 1400s casting technology were theoretically possible but lacked contemporary mathematics or demand.