The Science of Discworld Revised Edition

90–1
    Thales 71
    theories, testing 90–1
    Theory of Everything 101–7
    therapsids 283, 317–8
    Thompson, Adrian 219–222
    Thompson, J.J. 78
    thorium 80
    thought 79*
    experiments 11
    thylacine (aka Tasmanian tiger; Tasmanian wolf) 320
    tides 170,173,175–7, 202
    tigers 320, 322, 324, 380*, 382
    time 51, 53–8, 62–3, 91–2, 108, 165, 239, 335, 364, 381
    dilation 92
    origins of 53–6, 58
    and Special Relativity 91
    tin 75, 82
    Tingamarra 321
    Tobias, Phillip 337
    transition zones 142
    ‘Tree of Life’ view of evolution 239–42
    trees 161, 179, 203, 241, 321
    rate of growth, and tides 179
    Triassic period 232, 285, 287, 317
    tribal cultures 352
    triceratops 283, 289
    trickery and apparent coincidence 270
    Trilling, David 129
    trilobites 241
    triploblasts 199–201, 231
    tritium 79
    truth 101,188, 378
    tuatara 285, 288
    Tunguska meteorite 254
    turtles 5, 9, 10, 27, 32–4, 51, 53–4, 61, 73, 84, 99, 115, 152, 170, 181, 285–6, 295, 313, 380
    Twins Paradox 13
    tyrannosaurs 283, 285, 287, 289, 292
    Tyrannosaurus rex
304
    U
    UFOs 326–7, 355
    ultraviolet light 195
    underground ocean in Europa 133
    uniramians 241
    United States 172, 312, 364
    universals (features of organisms) 243
    universe
    age of 55–6
    and Big Bang 56,60, 62, 78–9, 80*, 101–2
    changing rules of 62, 68, 83
    evolving, theory of (Smolin) 25, 62–3
    expansion of 57–8, 94–5
    initial conditions and rules 61–2
    origin of 52–62
    shape of 90
    universities 44*
    unnatural selection 203–8
    unnilunium 81
    unstable atoms 10, 80
    unstable elements 81
    ununnilium 10, 81
    uranium 23–5, 80
    uranium-235 24–5
    uranium-238 24
    Uranus 117–8, 127, 157
    Ursae Majoris (47 Ursae Majoris star) 129
    V
    vacuum 26*, 34, 51, 62, 95, 186
    vacuum energy 95
    Velikovsky, Immanuel 125, 258
    velociraptor 289, 292, 303
    Venus 117,124–5,127,171. 253, 259
    Verne, Jules 367
    vertebrates 316, 324, 335
    vibration of molecules 163
    Villeneuve, Jacques 268
    Virginis (70 Virginis star) 129
    viruses 196, 215
    volcanic dust 229
    volcanic vents 132, 134, 197–8, 202, 231
    volcanoes 141, 172, 287, 307
    Vredefort impact structure 253–4
    W
    Wächtershäuser, Günther 197
    Walcott, Charles 240
    Walking with Dinosaurs
282, 293
    Wallace, Alfred 210–11
    Warrawoona, Australia 195
    wars and warfare 365
    nuclear 158, 364–5
    water 34, 43, 71–2, 74, 122, 133–4, 141, 145, 157–8, 163–5, 171, 175–7, 195, 197–8, 243, 268, 274, 305, 323, 325*
    as ancient element 71
    as compound 72, 74
    formation of 122
    humans and 337–8
    underground in Europa 133–4
    wave functions 108
    weather 36, 51, 124, 140, 156, 172,175, 325
    Web Between the Worlds, The
(Sheffield) 370
    Webb, John 26
    Wegener, Alfred 146–7
    weight 74–8, 123, 128, 157, 160, 184, 336, 369
    atomic 74, 76, 78
    Welch, Raquel 285
    Wells, H(erbert) G(eorge) 282–3
    werewolf legend 171
    whales 285–6, 309, 311, 316, 323
    ‘what if’ questions in science 11–12, 25
    Whit
(Banks) 355
    white dwarf 260
    White Hole 95
    Whittington, Harry 240
    Wilkins, Bishop John 367
    Wireless World
39
    Wisdom, Jack 124
    witches 9, 109, 328–9
    Wolszczan, Aleksander 128
    wolves 171
    Wonderful Life
(Gould) 240
    Worlds in Collision
(Velikovsky) 125
    World War II 24
    written word, power of 354
    X
    x-rays 57, 127, 129
    Xiao, Shuhai 200
    Y
    year, duration of 35
    yeast 216–7, 326
    Z
    Zaire 334
    Zamagna, Bernard 367
    zebras 12
    Zhang, Yun 200
    zinc 75

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    Version 1.0
    Epub ISBN 9781407022659
    www.randomhouse.co.uk
    First published in Great Britain in 1999
    This revised edition published in 2002 by Ebury Press
    11
    Copyright © Terry and Lyn Pratchett, Joat Enterprises, Jack Cohen 1999
Line drawings Copyright © Paul and Sandra Kidby 1999
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