The picture above is of a proper, six-sided snowflake, whose symmetry was noticed 400 years ago by Kepler. Phil Ball explains the history.
Today is the start of a new year. I hope that all readers of Petrona found much to enjoy in 2011, and will have a happy, prosperous and healthy 2012.
In planning your 2012 reading, you might like to glance at:
25 favourites of books I’ve reviewed in 2011 (no special order).
All my book reviews from 2011, helpfully ranked with a 1-5 star system.
My posts about Norwegian crime fiction and Swedish crime fiction. These were my two most-viewed posts from 2011, the Norwegian one being the most popular.