- **Optogenetic memory recall**: A 2012 Nature paper (PMID 22441246) showed that optogenetically re-activating hippocampal neurons tagged during fear conditioning in mice triggers freezing behavior, reigniting debate over whether memories are encoded in firing patterns versus synaptic topology.

- **DIYbio lab refrigeration**: For a 2×3 m² lab, a standard kitchen fridge/freezer suffices; dNTPs need –20 °C, but –80 °C freezers are “super useful” if space/budget allow; avoid frost-free models or buffer reagents in styrofoam to prevent temperature cycling.

- **Nootropic sourcing**: The peptide Noopept is highlighted as a popular cognitive enhancer, available on eBay and in bulk from cerebralhealth.com, with #reddit-nootropics recommended for further guidance.

- **Self-assembly learning**: DNA origami is suggested as an accessible entry point for newcomers interested in self-assembly technologies.

- **Open-hardware rocketry**: Copenhagen Suborbitals’ liquid-propellant engine tests and proposed manned launch videos illustrate grassroots aerospace development.

- **Tetrachromacy speculation**: Discussion of human/animal four-color vision prompts speculation about future display standards capable of rendering extended color gamuts.

- **Library.nu shutdown**: The former ebook repository now redirects to an Al Jazeera op-ed by Christopher Kelty on the disappearance of virtual libraries, tying into broader open-access and intellectual-property debates.

- **Media framing analysis**: Al Jazeera English is framed as a response to BBC’s declining international credibility, contrasting Fox News’ domestic nationalist appeal with Al Jazeera’s global audience strategy, using a thought experiment of Fox News translated into Arabic to explore cultural context and propaganda tactics.