- The Silurian Hypothesis paper (arXiv:1804.03748) and a related Scientific American article were shared, exploring whether any prior industrial civilization on Earth would leave detectable traces in the geological record.  
- nmz787 linked a YouTube demo showing how to hand-solder a WCSP (Wafer-Level Chip-Scale Package) to an inexpensive 2-layer PCB, prompting discussion about the practical differences between WCSP and bare-die formats.  
- A PNAS paper on Roswell Biotechnologies’ 180 nm CMOS sensor array was highlighted: 16 384-pixel chip post-processed at IMEC to expose Ruthenium nano-electrodes (14–20 nm gaps) for single-molecule tunneling-current detection at 1 kHz frame rate with 10-bit resolution.  
- nmz787 noted that Ruthenium had been recommended three years earlier as an electrode material for quantum-tunneling-based molecular sensing, aligning with the Roswell/IMEC work.  
- A Discord server (discord.gg/cbcRm7yfgZ) focused on bioMEMS was mentioned as a next step toward prototyping a test chip leveraging these nano-electrode techniques.