- Chalkdust

Dear Dirichlet, Issue 15
Weddings, holidays and catfish find their way into the prof's postbox this issue.
Fun phenomena in fluids
A selection of weird goings-on from the world of fluid mechanics
Creating hot ice
We created hot ice from scratch, a solution that remains liquid even below its freezing point!
Review of Elastic Numbers
We have a go at the puzzles in Daniel Griller's new book
Why self-service machines give such awful change
Unexpected item in bagging areAAAARGGGHH here's 90p change in pennies
The analytics of healthcare
Simple Statistics can help businesses make informed decisions