The best writing on mathematics: 2015

Introduction / Mircea Pitici

A dusty discipline / Michael J. Barany and Donald MacKenzie

How puzzles made us human / Pradeep Mutalik

Let the games continue / Colm Mulcahy and Dana Richards

Challenging magic squares for magicians / Arthur T. Benjamin and Ethan J. Brown

Candy Crush's puzzling mathematics / Toby Walsh

Chaos on the billiard table / Marianne Freiberger

Juggling with numbers / Erik R. Tou

The quest for randomness / Scott Aaronson

Synthetic biology, real mathematics / Dana Mackenzie

At the far ends of a new universal law / Natalie Wolchover

Twisted math and beautiful geometry / Eli Maor and Eugen Jost

Kenichi Miura's water wheel, or, The dance of the shapes of constant width / Burkard Polster

Dürer: disguise, distance, disagreements, and diagonals! / Annalisa Crannell, Marc Frantz, and Fumiko Futamura

The quaternion group as a symmetry group / Vi Hart and Henry Segerman

The Steiner-Lehmus angle-bisector theorem / John Conway and Alex Ryba

Key ideas and memorability in proof / Gila Hanna and John Mason

The future of high school mathematics / Jim Fey, Sol Garfunkel, Diane Briars, Andy Isaacs, Henry Pollak, Eric Robinson, Richard Scheaffer, Alan Schoenfeld, Cathy Seeley, Dan Teague, and Zalman Usiskin

Demystifying the math myth: analyzing the contributing factors for the achievement gap between Chinese and U.S. students / Guili Zhang and Miguel A. Padilla

The pigeonhole principle, two centuries before Dirichlet / Benoît Rittaud and Albrecht Heeffer

A prehistory of Nim / Lisa Rougetet

Gödel, Gentzen, Goodstein: the magic sound of a G-string / Jan von Plato

Global and local / James Franklin

Mathematical beauty, understanding, and discovery / Carlo Cellucci

A guide for the perplexed: what mathematicians need to know to understand philosophers of mathematics / Mark Balaguer

Writing about math for the perplexed and the traumatized / Steven Strogatz

Is big data enough? A reflection on the changing role of mathematics in applications / Domenico Napoletani, Marco Panza, and Daniele C. Struppa

The statistical crisis in science / Andrew Gelman and Eric Loken

Statistics and the Ontario Lottery retailer scandal / Jeffrey S. Rosenthal

Never say never / David J. Hand.