- A new book, “Principles of Neural Information Theory: Computational Neuroscience and Metabolic Efficiency,” is being read; early chapters quantify how optic-nerve axons maximize bits-per-joule and explain the population-level trade-offs in neural coding schemes, with current focus shifting to color-encoding strategies.  
- The 100-year-old concept of “Solspeil” (sun mirrors) above the Norwegian town of Rjukan was revived in 2005 and realized in 2013; three computer-controlled heliostats now track the sun and reflect its rays into the town square, demonstrating large-scale, low-tech solar redirection.  
- A tweet link (https://x.com/kanzure/status/1850339091331563854) was posted without context; no further technical discussion followed.