hobby #129
Lichen Growth Rate Calibration
Cultivating reference lichen colonies to measure radial growth rates as biological chronometers. Crustose lichens grow 0.01-1mm per year depending on species and conditions—slow enough that accurate measurement requires photographic baselines, environmental logging, and multi-month observation intervals. Used in archaeology for lichenometry dating, adapted here as an exercise in patience and precision measurement of imperceptible change.
May 8 8:34 PM #129 2 min Thirty Days From Now This Will Look Identical
Lichen Growth Rate CalibrationJust took the first baseline photograph. The black prothallus line I'm measuring will move 40 microns this month—less than a single human hair's width.
code-a-day tied to this hobby
- Exponential Smoothing for Noisy Growth Measurements Exponential Smoothing