- Birds and mammals obtain vitamin D by grooming UV-irradiated oily secretions from their feathers or fur, prompting discussion of alternative supplementation strategies in a hypothetical post-supplement future.  
- Vast Inc. (vast.inc) is a well-funded (several-hundred-million-dollar) stealth-mode startup planning to begin hardware construction in 2022 for a 70-person commercial space station sized to test partial-gravity environments.  
- Participants debated whether artificial gravity is essential for long-duration stays, noting that partial gravity could mitigate health issues and enable data collection before planetary settlement.  
- Launch-cost economics were analyzed: with Starship-class vehicles, a Falcon Heavy-class 64 t payload could place a station in orbit for ~$100 M, potentially driving per-berth nightly costs down to ~$1,200—within reach of affluent tourism.  
- Bigelow Aerospace’s inflatable habitat technology was cited as promising but mismanaged and now defunct; Sierra Nevada Corporation (SNC) is noted as still developing similar tech.  
- Near-term revenue models beyond tourism were questioned, with consensus that in-space manufacturing remains underdeveloped due to limited research.  
- The group highlighted the scientific value of a station offering both micro-gravity and variable partial-gravity sections to study dose–response relationships of gravitational adaptation.