Science of Discworld III

BY THE SAME AUTHORS :
TERRY PRATCHETT
THE CARPET PEOPLE • THE DARK SIDE OF THE SUN • STRATA
TRUCKERS • DIGGERS • WINGS • ONLY YOU CAN SAVE MANKIND
JOHNNY AND THE DEAD • JOHNNY AND THE BOMB
THE JOHNNY MAXWELL TRILOGY • JOHNNY AND THE DEAD (adapted by Stephen Briggs)
THE UNADULTERATED CAT (with Gray Jolliffe) • GOOD OMENS (with Neil Gaiman)
T HE D ISCWORLD ® SERIES :
THE COLOUR OF MAGIC • THE LIGHT FANTASTIC • EQUAL RITES
MORT • SOURCERY • WYRD SISTERS • PYRAMIDS • GUARDS! GUARDS!
ERIC (with Josh Kirby) • MOVING PICTURES • REAPER MAN • WITCHES ABROAD
SMALL GODS • LORDS AND LADIES • MEN AT ARMS • SOUL MUSIC
INTERESTING TIMES • MASKERADE • FEET OF CLAY • HOGFATHER • JINGO
THE LAST CONTINENT • CARPE JUGULUM • THE FIFTH ELEPHANT • THE TRUTH
THIEF OF TIME • NIGHT WATCH • MONSTROUS REGIMENT • GOING POSTAL
THE AMAZING MAURICE AND HIS EDUCATED RODENTS
THE WEE FREE MEN • A HAT FULL OF SKY
THE COLOUR OF MAGIC (graphic novel) • THE LIGHT FANTASTIC (graphic novel)
MORT: A DISCWORLD BIG COMIC (illustrated by Graham Higgins)
GUARDS! GUARDS! A DISCWORLD BIG COMIC (adapted by Stephen Briggs, illustrated by Graham Higgins)
SOUL MUSIC: The illustrated screenplay • WYRD SISTERS: The illustrated screenplay
MORT – THE PLAY (adapted by Stephen Briggs)
WYRD SISTERS – THE PLAY (adapted by Stephen Briggs)
GUARDS! GUARDS! – THE PLAY (adapted by Stephen Briggs)
MEN AT ARMS – THE PLAY (adapted by Stephen Briggs)
MASKERADE (adapted for the stage by Stephen Briggs)
CARPE JUGULUM (adapted for the stage by Stephen Briggs)
LORDS AND LADIES (adapted for the stage by Irana Brown)
INTERESTING TIMES (adapted by Stephen Briggs)
THE FIFTH ELEPHANT (adapted by Stephen Briggs)
THE AMAZING MAURICE AND HIS EDUCATED RODENTS (adapted by Stephen Briggs)
THE STREETS OF ANKH-MORPORK (with Stephen Briggs)
THE DISCWORLD MAPP (with Stephen Briggs)
A TOURIST GUIDE TO LANCRE a Discworld Mapp (with Stephen Briggs and Paul Kidby)
DEATH’S DOMAIN (with Paul Kidby) • NANNY OGG’S COOKBOOK
THE SCIENCE OF DISCWORLD (with Ian Stewart and Jack Cohen)
THE SCIENCE OF DISCWORLD II: THE GLOBE (with Ian Stewart and Jack Cohen)
THE DISCWORD COMPANION (with Stephen Briggs)
THE PRATCHETT PORTFOLIO (with Paul Kidby) • THE LAST HERO (with Paul Kidby)
IAN STEWART
CONCEPTS OF MODERN MATHEMATICS • GAME, SET, AND MATH
THE PROBLEMS OF MATHEMATICS • DOES GOD PLAY DICE?
ANOTHER FINE MATH YOU’VE GOT ME INTO • FEARFUL SYMMETRY
NATURE’S NUMBERS • FROM HERE TO INFINITY • THE MAGICAL MAZE
LIFE’S OTHER SECRET • FLATTERLAND • WHAT SHAPE IS A SNOWFLAKE?
THE ANNOTATED FLATLAND • MATH HYSTERIA
JACK COHEN
LIVING EMBRYOS • REPRODUCTION • PARENTS MAKING PARENTS
SPERMS, ANTIBODIES AND INFERTILITY • THE PRIVILEGED APE
STOP WORKING AND START THINKING (with Graham Medley)
IAN STEWART AND JACK COHEN
THE COLLAPSE OF CHAOS • FIGMENTS OF REALITY
EVOLVING THE ALIEN (alternative title: WHAT DOES A MARTIAN LOOK LIKE?)
WHEELERS (science fiction) • HEAVEN (science fiction)



In crossing a heath, suppose I … found a watch upon the ground … The inference, we think, is inevitable; that the watch must have had a maker .
WILLIAM PALEY
NATURAL THEOLOGY
    Divine Design, the conscious process of creation, which Paley discovered, and which we now know is the explanation for the existence and purposeful form of all life, always has purpose in mind. If the Deity can be said to play the role of Watchmaker in nature, He is an all-seeing Watchmaker .
THE REV. CHARLES DARWIN
THEOLOGY OF SPECIES
    There is grandeur in this view of life … and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved .
THE REV. RICHARD DAWKINS
THE ORIGIN OF SPECIES
    There is grandeur in this view of life … and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved .
CHARLES DARWIN
THE ORIGIN OF SPECIES
    Natural selection, the blind, unconscious automatic process which Darwin discovered, and which we now know is the explanation for the existence and apparently purposeful form of all life, has no purpose in mind … If it can be said to play the role of watchmaker in nature, it is the blind watchmaker .
RICHARD DAWKINS
THE BLIND WATCHMAKER
    In crossing a heath, suppose I