- Evolution of eyes: a participant argues that the mainstream view (multiple independent eye origins) is more parsimonious than symbiotic-origin theories, and notes that single-celled organisms already exhibit surprisingly complex sub-cellular structures such as light-sensitive “eyespots.”  
- Designer-baby attitudes: a survey showing younger people are more supportive of human genetic engineering is discussed; the generational divide is attributed to the fact that younger people are the ones actually having children.  
- Crystal-oscillator physics: the channel explores whether mechanical acceleration can shift the frequency of quartz oscillators; measurements show ~1.8 ppb per g sensitivity, raising the possibility of using clock-drift as a side-channel for extracting information from secure devices.  
- MEMS vs. quartz: MEMS oscillators and accelerometers are suggested as purpose-built motion sensors, but the discussion focuses on whether standard CPU crystals could be exploited for covert motion detection or device fingerprinting.  
- Wi-Fi/BLE device fingerprinting: research is cited that re-identifies individual wireless devices by minute clock-skew and I/Q-offset signatures leaked in their radio transmissions.  
- DIY maskless photolithography: Sam Zeloof’s project of attaching a DLP projector to a microscope to pattern sub-10 µm features is highlighted as a practical route for garage semiconductor fabrication; UV LCDs from SLA printers are considered as an alternative light source.  
- Wavelength limits of optics: reflective optics and far-UV (≈ 122–200 nm) sources are noted as ways to push resolution below what fused-silica refractive systems can achieve, though at rapidly escalating cost.  
- USDA nutrition-database wrangling: participants compare the legacy ASCII, newer CSV, and JSON releases of the U.S. nutrient database; advice is given to load the relational tables into SQLite and use SQL joins rather than ad-hoc text processing to handle the normalized schema.  
- Whole-genome sequencing cost: the group asks for recent first-hand prices and data-access experiences; a 2019 Veritas Genetics $600 WGS price point is cited as a baseline.