The big argument - Chalkdust

Sophie gets photos with any cat or dog she can.
+ More articles by Sophie

Ellen is a PhD student at UCL studying fluid mechanics. She specialises in the flow around droplets and ice particles.
+ More articles by Ellen

In conversation with Christina Pagel
Ellen Jolley asks for (independent) Sage advice
Dear Dirichlet, Issue 12
Books, business and barns are the topics readers have sent in to the professor's postbox this issue
Prize crossnumber, Issue 12
£100 of MathsGear goodies to be won if you can solve it
#MarkovMadeMeTweet
A handy tool that can make writing great tweets much easier
What’s hot and what’s not, Issue 12
Fashion is fleeting, Chalkdust regulars are not.
How to make: a chaotic scatterer
Make your own scatterer from some old Christmas decorations