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2．A Wall Built along the Hillside2

3．The Song of the Humpback Whale3

1．A Biological Clock4

4．Disputes about Animal Tests4

5．What Made Them Geniuses?5

6．How the Wasps Attack the Beetles6

7．Chronic Fatigue Syndrome7

8．Pollution in Antarctica8

9．In Search of Planets outside Our Solar System9

10．Was Robert Peary the First Person to Reach the North Pole?10

11．Can Paper Last a Long Time？11

12．In the World of Ants12

13．Phobos I and Phobos Ⅱ13

14．Underground Drip Irrigation14

15．A New Birth Control Vaccine15

16．Research Balloons16

17．Smokeless Cigarettes17

18．The Airborne Arctic Stratospheric Experiment18

19．A Computer Virus19

20．The Monarch Butterfly20

21．The Reuse of Irrigation Water21

22．Beekeeping22

23．Superconductive Materials23

24．Biological Control for the Cassava Hornworm24

25．Extremely Small Machines25

26．The Fate of Smokeless Cigarettes26

27．Sunspots27

28．How Rhinoviruses Invade the Body28

29．How to Make a Simple Microscope29

30．Five Days in an Experimental Glass Building30

31．Manic Depression31

32．Fighting Air Pollution32

33．Sensitive Corals33

34．Pluto s Atmosphere34

35．Bagasse Feed35

36．Solar-powered Refrigerators36

37．Conservation Reserve Program37

38．Developing New Techniques to Find Problems in Older Planes38

39．High-definition Television39

40．Choose Your Crops40

41．Another Season of Exploration in Antarctica41

42．International Center for Tropical Agriculture42

43．The Ant Man43

44．New Findings about How Genes Work44

45．Hubble Telescope and the Moon Telescope45

46．Natural Farming46

47．Hypothermia47

48．A Comprehensive Utilization of Azolla48

49．National Research Council49

50．Even Young Children Can Learn a Great Deal50

51．Rooftop Gardens51

52．Hearing Loss52

53．The Supply and Demand of Natural Materials53

54．Urinary Incontinence54

55．The Tanzania Oil Press55

56．Cures for Environmental Problems56

57．Rabbit Waste57

58．New Kinds of Rice58

59．Testing a New Way of Growing Bamboo Plants59

60．The Dangers of Low Amounts of Radiation60

61．Global Warming61

62．Is Asbestos a Health Threat?62

63．A Simple Earth-moving Device63

64．New Rules Governing Food Products64

65．How to Reduce Hunger65

66．Biotechnology66

67．Waterweeds67

68．US768

69．Tuna Fish and Dolphins69

70．Bicycle Centers70

71．Ectopic Pregnancies71

72．The Mysterious Flowing Sand72

73．Research on Type One Diabetes73

74．The Influence of Light on the Human Body Clock74

75．Customs at New Year s Day75

76．Treating Food with Low-level Radiation76

77．The African Dust and Amazon Soil77

78．The Map of the CD4 Protein78

79．Geologists New Idea79

80．A Man-made Kind of Photosynthesis80

81．Useful Lessons Drawn from the Wheeled Tool Carrier81

82．A New Way of Producing Electricity82

83．American Peanut Production in 199183

84．Ethanol:A Clean and Cheap Fuel84

85．How to Fool the Trees85

86．Eager Beaver86

87．How Researchers Get the Rare Things They Study87

88．Is the Biosphere Project a Success?88

89．A Robot Will Explore the Mysteries of a Volcano89

90．The Explosion of Mount Pinatubo Affects the World s Weather90

91．Cover Crops91

92．The X30 Space Plane92

93．The Main Reason People Get Fat93

94．Using Animal Organs for Transplant Operations94

95．Protect the Health of Pregnant Women95

96．Rain Forest Exhibits96

97．Genetically-changed Animals97

98．The Buffalo98

99．A New Plan to Vaccinate American Children99

100．For the Benefit of Deaf Children100

GLOSSARY101