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1 The Animal Kingdom

1. An Australian Surprise: The Koala Bear 2

2. The Cold Swimmer 8

3. The Dolphin 14

2 Human Behavior

1. Why Do We Yawn? 22

2. Happy Medicine 28

3. Dream a Little Dream 34

Review Units 1&2 40

3 Agricultural History

1. Bamboo 44

2. The Everyman Food 50

3. Super Foods 56

4 The Sound of Music

1. History of the Ukulele 64

2. Old Time Rock ��n�� Roll 70

3. Making Music: The Synthesizer 76

Review Units 3&4 82

5 Work

1. The World of Work: Future Jobs 86

2. A Reason for Working 92

3. Future Work: The Virtual Office 98

6 Leisure Activities

1. Reaching New Heights: Rock Climbing 106

2. Playing Online 112

3. Cosplay 118

Review Units 5&6 124

7 Native Cultures

1. A Watery Thai New Year 128

2. The Ainu Live On 134

3. The Maori 140

8 Incredible Journeys

1. Extreme Running: Kílian Jornet 148

2. A Gift with a Long Neck 154

3. A Lone Journey 160

Review Units 7&8 166

Vocabulary List 168

Irregular Verbs 172