Mathematicians may seem serious, but they're actually very laid-back.
They like throwing parties with the goal of maximization of efficiency and aren't beyond a little witty wordplay.
And what can a person do that is absolutely terrifying? Correct: jigsaws.
The end product is a concise six-page paper that applies the idea of optimum circular packing to your grandma's favorite thing to do on rainy days.
(It should be mentioned that the paper's geometry calculations are rather elementary and probably right, but it is merely a preprint and not peer-reviewed.)
One biophysicist and one experimental quantum physicist were involved, rather than mathematicians.
"Could you predict how much space the pieces will take up before you put them together?" in an interview with New Scientist.