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Lesson 1 Finding fossil man 1

Lesson 2 Spare that spider 5

Lesson 3 Matterhorn man 8

Lesson 4 Seeing hands 11

Lesson 5 Youth 14

Lesson 6 The sporting spirit 17

Lesson 7 Bats 20

Lesson 8 Trading standards 23

Lesson 9 Royal espionage 26

Lesson 10 Silicon valley 30

Lesson 11 How to grow old 33

Lesson 12 Banks and their customers 36

Lesson 13 The search for oil 40

Lesson 14 The butterfly effect 43

Lesson 15 Secrecy in industry 47

Lesson 16 The modern city 51

Lesson 17 A man-made disease 54

Lesson 18 Porpoises 57

Lesson 19 The stuff of dreams 60

Lesson 20 Snake poison 64

Lesson 21 Williams S.Hart and the early"Western"film 67

Lesson 22 Knowledge and progress 70

Lesson 23 Bird flight 73

Lesson 24 Beauty 77

Lesson 25 Non-auditory effects of noise 80

Lesson 26 The past life of the earth 84

Lesson 27 The"Vase" 87

Lesson 28 Patients and doctors 90

Lesson 29 The hovercraft 94

Lesson 30 Exploring the sea-floor 98

Lesson 31 The sculptor speaks 101

Lesson 32 Galileo reborn 104

Lesson 33 Education 108

Lesson 34 Adolescence 111

Lesson 35 Space odyssey 114

Lesson 36 The cost of government 117

Lesson 37 The process of ageing 120

Lesson 38 Water and the traveller 123

Lesson 39 What every writer wants 126

Lesson 40 Waves 129

Lesson 41 Training elephants 132

Lesson 42 Recording an earthquake 135

Lesson 43 Are there strangers in space？ 138

Lesson 44 Patterns of culture 141

Lesson 45 Of men and galaxies 144

Lesson 46 Hobbies 147

Lesson 47 The great escape 150

Lesson 48 Planning a share portfolio 153

参考答案 156