- A DIY experiment demonstrating the Fresnel prism adaptation effect is available at http://fechner.uni-graz.at/team/kaernbach/prism-adaptation/DIY-experiment.htm, offering a low-cost way to explore visual plasticity.

- A practical mechanical tip was shared for the SKDB (open-source hardware database): always wind cord onto a rotating drum rather than a fixed one to avoid introducing twists that later cause tangles.

- Discussion noted that liquid-crystal devices can function as electro-optical phase modulators when polarizers are omitted, raising the possibility of using an LCD panel to create pixel-level destructive interference between two laser beams.

- A link to an amateur transatlantic UAV project was posted: http://tam.plannet21.com/index.htm, illustrating grassroots aerospace experimentation.

- NASA’s new lunar rover prototype—described as having metal components and the ability to drive sideways—was mentioned as participating in the 2009 U.S. presidential inauguration parade, highlighting public outreach for advanced space hardware.