Unit 1
Lesson 1 Should We Blow Up the Moon?
Lesson 2 The Mysterious Life of Twins
Lesson 3 Is the Earth Alive?
Lesson 4 Great Balls of Fire
Lesson 5 Firestorms
Lesson 6 Dowsing：Fact or Fiction?
Unit Summarizing 1
Unit 2
Lesson 7 Traveling Through Time
Lesson 8 A Silent Killer
Lesson 9 The Healing Power of Maggots
Lesson 10 Psychics Who Solve Crimes
Lesson 11 Mummies
Unit Summarizing 2
Unit 3
Lesson 12 Near-Death Experiences
Lesson 13 Is Anyone Out There?
Lesson 14 It’S An in Your Head
Lesson 15 Cryonics：Death on Ice
Lesson 16 Needles That Cure
Unit Summarizing 3
Appendix
Answer Key
