Game shows, flight and social media bots are among the problems solved in this issue's Dear Dirichlet agony aunt column
Henry Jaspars tries to untangle a mixed-up drinks order
A crossnumber clue takes us plunging headfirst towards projective geometry
Have a go at these puzzles, adequate for your holidays!
After 100 years, a key postulate of the third law of thermodynamics has been proven. We meet Lluis Masanes, one of the researchers responsible.
More than spirals and rabbits, Fibonacci gave us something much more fundamental.
