- Open-source MRI initiative (opensourceimaging.org) has built ~3 working prototypes using permanent magnets (~15–20 k$ BOM) and offers 7 hours of workshop videos; field strength is lower than clinical systems but sufficient for structural imaging and far better than X-ray for soft tissue.  
- Discussion of antimatter production via hypervelocity macron accelerators: 7 000 km s⁻¹ impacts yield ~24 GJ g⁻¹; feasibility of kg-per-year antimatter output for fusion propulsion and high-value energy markets was debated.  
- Critique of “IQ-centric” transhumanism: fenn argues that valuing only high-IQ genes risks cognitive imperialism and that broader human-improvement markets (selection + engineering) will scale faster if inclusive.  
- docl proposes three non-IQ factors driving technological progress: narrative setting for coordination, cross-pollination of ideas across domains, and quantitative rigor; notes academia over-optimizes rigor at the expense of the other two.  
- Memory enhancement vs IQ debate: participants list distinct memory systems (working, episodic, procedural, olfactory, etc.) and question whether n-back training transfers beyond the test itself.  
- kanzure suggests home positron-emission imaging or tabletop supercolliders for neuro-anatomy; PET resolution is fundamentally limited to ~1 mm by positron range before annihilation.  
- Eli frames sperm-donor selection as an existing, scalable route to reduce “evolutionary mismatch,” noting 30–60 k donor births per year and the possibility of voluntary genetic optimization.  
- Links shared: ToughSF post on macron accelerators, A&A paper on low-cost interstellar precursors, Scripps Mycoplasma model gallery, and a $100 metal 3-D printer video.