By Richard Morris
By I. Bernard Cohen (Harvard University)
By David C. Cassidy
By Malcolm Gladwell
By Jeffrey Quill
By David Watkins, John Wilson
By Katsuhiko Tokunaga
By Paul Kennedy
By R. M. Clarke, Anders Clausager
By Anton Gill
By L T C Rolt, Neil Cossons
By Allan J. McDonald, James R. Hansen
By J. Garth Watson
By Erik C. Banks (Wright State University, Ohio)
By Sue Colledge, James Conolly
By Dan Cruickshank, Steven Brindle
By Tim James
By Lisa Jardine
By Walter Isaacson
By William L. Bernstein
By Colin Emmins
By Keith Kirby (Oxford University, UK), Charles Watkins (School of Geography, University of Nottingham
By Matthew Ball
By Jonas Ljungberg
By Rick Archbold, Ken Marschall
By Martin Ford
By Neil Faulkner
By Hammond, Martin