"On the 27th of January, 1887, a snowflake apparently fell in Montana, and it was 57cm (22.4in) across ...but they have no proof of that."
In SnowFlakeology from PechaKucha Night Tokyo Vol. 131, PK co-founder Mark Dytham drops some cold hard science on frozen crystals falling from the sky. Whether elaborating on 2-dimensional radiating dendrites crystals, or 3-dimensional Gohei-twin type flakes, or digital ASCII/Unicode icy forms, it's crystal-clear he's done his homework. Simply put, Mark's extensive snowflake knowledge is...well...chilling.
...he definitely didn't flake on this PechaKucha! It snow joke!
This was "PechaKucha of the Day" on Friday, December 25th, 2015.