- trail cameras, number stations, ambient channels
- powerlines, turbines, dopplers
- alpines, tundras, prairies
- botany and agriculture/horticulture
- (recreational) drugs
- cannabis, 2cb, mdma
- dextroamphetamines
- neurology, genetics, and related pharmacy
- traditional cosmetics and costuming
- most humanities and social sciences
- leftist theory
- literacy and linguistics
- (childhood) psychology and education
- hardware architecture and engineering
- general computer literacy
- homebrewing / modding
- html / css
- 1985 - 2015 phenomena and artifacts
- lost music and material items
- generally anything else niche and/or obscure
- maker culture and everything associated
dec 3 2023 ∞
jan 22 2026 +