Unit 1 The Perfect Swarm 1
Unit 2 The Red Devils 19
Unit 3 The Orient Express 35
Unit 4 The Varied Cultures of China 53
Unit 5 Afghanistan's Heroic Artists 69
Unit 6 Natacha's Animal Rescue 87
Unit 7 Firewalking 107
Unit 8 Living in the Slow Lane 123
Unit 9 Alternative Energy 137
Unit 10 Mars on Earth 155
Glossary 173