By Amir Alexander
By Bulent Atalay
By Robin Wilson
By Stephen Hawking
By John Allen Paulos
By Reviel Netz, William Noel
By Ray Monk
By Tom Chivers
By A. G. Hamilton
By Owe Axelsson (Katholieke Universiteit Nijmegen, The Netherlands)
By Luke Heaton
By Amir D Aczel
By Kanigel, Robert
By Cobb, Paul, Bauersfeld, Heinrich
By Polya, George
By O'Shea, Donal